{"count":88,"message":"Results returned successfully","results":[{"odiNumber":11746696,"manufacturer":"General Motors, LLC","crash":false,"fire":false,"numberOfInjuries":0,"numberOfDeaths":0,"dateOfIncident":"06/26/2026","dateComplaintFiled":"06/26/2026","vin":"1GTPUAEK5SZ","components":"POWER TRAIN,ELECTRICAL SYSTEM,FUEL/PROPULSION SYSTEM","summary":"While driving at highway speed, my 2025 GMC Sierra suddenly began slowing down without warning and lost propulsion. When I pressed the accelerator, there was no acceleration response. The vehicle felt like it was braking or dragging instead of accelerating, creating a serious crash risk in traffic. A warning message appeared instructing me to \u201cPut in neutral and restart truck.\u201d I followed the instruction, but the vehicle would not restart. It sounded like it was attempting to start, but it would not start normally. A \u201cService ESC\u201d warning also appeared.  The vehicle was towed by AAA to a GMC dealership and remains available for inspection. The dealership provided a diagnostic trouble code report showing active codes: C2A07 Engine Control Module Indicated Torque Signal Malfunction; U0101 Lost Communication with Transmission Control Module; U0131 Lost Communication with Power Steering Control Module; U0140 Lost Communication with Body Control Module; U0146 Lost Communication with Central Gateway Module; U160F Lost Communication with Brake System Control Module 1 on CAN Bus 1; U1611 Lost Communication with Engine Control Module on CAN Bus 2; and U3003 Battery Voltage Circuit Voltage Below Threshold.  The vehicle had approximately 22,000 miles at the time of the incident. The failure has not been repaired at the time of this complaint. The concern appears to involve a safety-related electrical, propulsion, powertrain, ESC/brake, and module communication failure that caused sudden loss of propulsion, no acceleration response, warning messages, and a no-start condition.","products":[{"type":"Vehicle","productYear":"2025","productMake":"GMC","productModel":"SIERRA 1500","manufacturer":"General Motors, LLC"}]},{"odiNumber":11746734,"manufacturer":"General Motors, LLC","crash":false,"fire":false,"numberOfInjuries":0,"numberOfDeaths":0,"dateOfIncident":"06/01/2026","dateComplaintFiled":"06/26/2026","vin":"3GTUUDED8SG","components":"TIRES","summary":"2025 GMC Sierra, purchased new, is showing signs of severe dry rot on 3 of the 4 original tires. The vehicle has less than 8000 miles currently. This level of Dryrot poses a safety hazard for a vehicle that is less than 1 year old.","products":[{"type":"Vehicle","productYear":"2025","productMake":"GMC","productModel":"SIERRA 1500","manufacturer":"General Motors, LLC"},{"type":"Tire","productYear":"9999","productMake":"BRIDGESTONE","productModel":"DUELER AT","size":null,"manufacturer":"Bridgestone Americas Tire Operations"}]},{"odiNumber":11744393,"manufacturer":"General Motors, LLC","crash":false,"fire":false,"numberOfInjuries":0,"numberOfDeaths":0,"dateOfIncident":"05/09/2026","dateComplaintFiled":"06/16/2026","vin":"3GTUUGEL5SG","components":"ENGINE","summary":"The engine blew","products":[{"type":"Vehicle","productYear":"2025","productMake":"GMC","productModel":"SIERRA 1500","manufacturer":"General Motors, LLC"}]},{"odiNumber":11743745,"manufacturer":"General Motors, LLC","crash":false,"fire":false,"numberOfInjuries":0,"numberOfDeaths":0,"dateOfIncident":"06/08/2026","dateComplaintFiled":"06/12/2026","vin":"1GTUUHEL2SZ","components":"ENGINE","summary":"Notice during startups and slow speeds engine making taping noises. After bringing my truck in for service I was told my sound was my lifters on the passenger side.","products":[{"type":"Vehicle","productYear":"2025","productMake":"GMC","productModel":"SIERRA 1500","manufacturer":"General Motors, LLC"}]},{"odiNumber":11742881,"manufacturer":"General Motors, LLC","crash":false,"fire":false,"numberOfInjuries":0,"numberOfDeaths":0,"dateOfIncident":"06/01/2026","dateComplaintFiled":"06/09/2026","vin":"1GTUUDED4SZ","components":"POWER TRAIN,UNKNOWN OR OTHER,ENGINE","summary":"Either while stopping while driving or parking (forward or reverse) the engine RPMs go up thus wanting to move the vehicle in that direction causing the breaks needing to be applied harder. When you shift into neutral the RPMs go way up (3000). This has happened on this vehicle 3-4 times of which I have video of the latest occurrence. When put into R or D the RPMs are still over 1000. This also happened on the courtesy vehicle same make and model) I was given but on this one the RPMs went up to 5000 of which I also have a video. The dealership has not been able to duplicate the issue as of yet. My fear is that the vehicle will hit someone or something if the break isn't pressed to the floor. It happens very randomly. The dealer currently has my vehicle trying to figure it out. They say GM says there's nothing they can do. No warning lights or messages appeared.","products":[{"type":"Vehicle","productYear":"2025","productMake":"GMC","productModel":"SIERRA 1500","manufacturer":"General Motors, LLC"}]},{"odiNumber":11742413,"manufacturer":"General Motors, LLC","crash":false,"fire":false,"numberOfInjuries":0,"numberOfDeaths":0,"dateOfIncident":"06/02/2026","dateComplaintFiled":"06/06/2026","vin":"3GTUUEE83SG","components":"POWER TRAIN,ENGINE","summary":"Rough idle started at 11,400 miles. Took to GMC dealer near me and had thrust bearing clearance measured. Measured .0054\"(within spec). They released truck back to me.  19,400 mile oil change found large metal(non magnetic) slivers in the filter media. I cut filters to check for issues due to known issues with this engine(metal).  I called gmc corporate, i was told to not drive the truck. I paid out of pocket for the tow 142 miles away. Dealer told me they checked thrust bearing and came in at .0055\", no noises, and no check engine light. Idle is very rough on start up.  GM corporate stated a service advisor will call. Never got a call. I have sent and displayed the evidence and offered to show oil filter contents to both dealer and corporaten both have not done anything about this safety issue. This is a SEVERE safety issue. Engine is highly likely to lock up and cause serious injury to both me, my family, and others on the road. Dealer has released truck back to me and my family with clean bill stating they didnt find anything wrong. They refused to see my documentation of metal slivers or the 3 rimg binder full of maintenance records.  As of now i will be escalating this to higher up in GMC corporate.  SEVERE safety risk for my family and everyone on the road. GMC dealers refusing to diagnose.","products":[{"type":"Vehicle","productYear":"2025","productMake":"GMC","productModel":"SIERRA 1500","manufacturer":"General Motors, LLC"}]},{"odiNumber":11742293,"manufacturer":"General Motors, LLC","crash":false,"fire":false,"numberOfInjuries":0,"numberOfDeaths":0,"dateOfIncident":"03/24/2026","dateComplaintFiled":"06/05/2026","vin":"1GTUUGEL6SZ","components":"POWER TRAIN","summary":"Engine seized while driving, forced to pull off road to get out of traffic.","products":[{"type":"Vehicle","productYear":"2025","productMake":"GMC","productModel":"SIERRA 1500","manufacturer":"General Motors, LLC"}]},{"odiNumber":11741495,"manufacturer":"General Motors, LLC","crash":false,"fire":false,"numberOfInjuries":0,"numberOfDeaths":0,"dateOfIncident":"05/13/2026","dateComplaintFiled":"06/02/2026","vin":"3GTUUEEL4SG","components":"ENGINE","summary":"6.2L crankshaft failed","products":[{"type":"Vehicle","productYear":"2025","productMake":"GMC","productModel":"SIERRA 1500","manufacturer":"General Motors, LLC"}]},{"odiNumber":11740590,"manufacturer":"General Motors, LLC","crash":false,"fire":false,"numberOfInjuries":0,"numberOfDeaths":0,"dateOfIncident":"05/26/2026","dateComplaintFiled":"05/28/2026","vin":"3GTUUGEL6SG","components":"POWER TRAIN,ENGINE","summary":"In normal operation on Tuesday May 26,2026, the engine experienced catastrophic failure. The engine is the GM L87 6.2 Liter. This was on a highway in the country and I was able to maneuver the truck off the road before an accident occurred. It did leave me stranded and I was required to get it towed on a roll off (It was not drivable) to the dealer where I purchased it.   The dealer  [XXX] ) inspected my truck and  has informed me that the issues with my 2025 Sierra match the issues for the recall GM had for the model years 2021-2025. It will require a new engine, radiator,  among many other parts.   There weren't any previous warnings. A check engine light only came on once the engine was engine came apart. An oil change on the vehicle by GM was done a month ago. The truck is a 2025 and has approximately 6,600 miles is all.  INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)","products":[{"type":"Vehicle","productYear":"2025","productMake":"GMC","productModel":"SIERRA 1500","manufacturer":"General Motors, LLC"}]},{"odiNumber":11739770,"manufacturer":"General Motors, LLC","crash":false,"fire":false,"numberOfInjuries":0,"numberOfDeaths":0,"dateOfIncident":"11/02/2025","dateComplaintFiled":"05/24/2026","vin":"3GTUUCE82SG","components":"UNKNOWN OR OTHER","summary":"Upon purchase of my 2025 GMC Sierra, it did not come with a physical manual. I asked the dealer about this and they said they did away with them, only providing the digital version. I contacted GMC recently as I saw the a recall dor 2026 models with this exact issue, but they did not seem to care and it was for 2026 models only. I find this to be a loophole GMC is following, and would just like a manual so I can log maintenance like a normal person without a phone or sitting in my vehicle. Thank you","products":[{"type":"Vehicle","productYear":"2025","productMake":"GMC","productModel":"SIERRA 1500","manufacturer":"General Motors, LLC"}]},{"odiNumber":11738058,"manufacturer":"General Motors, LLC","crash":false,"fire":false,"numberOfInjuries":0,"numberOfDeaths":0,"dateOfIncident":"05/07/2026","dateComplaintFiled":"05/15/2026","vin":"3GTUUEE87SG","components":"ENGINE","summary":"My GMC sierra AT4 with the 3.0L Duramax Diesel, has 1,500 miles on it, when the engine failed. I was traveling from [XXX]  to [XXX] , towing a trailer, when the check engine light came, and the truck entered reduced power mode. It immediately slowed the truck without warning - which made for a very dangerous situation for all of the vehicles behind me and for my vehicle. After getting the vehicle and trailer to a dealer, disconnecting the trailer, and then getting the truck in the shop, the dealer defined the OBDII code as being P06DD - Engine oil pressure control solenoid valve stuck off. U0146 - Lost communication with central gateway module, and U1605 - Lost communication with side obstacle detection control module - right on private CAN Bus. The dealer indicated that the P06DD code meant that the thrust bearing on the crankshaft failed and the engine would need to be replaced.   The ending only has 1500 miles on it. It turns out that there are MANY GM 3.0L diesel engines that have failed for this issue and that GM issued a Technical Service bulletin in 2025 for this issue - TSB 25-NA-307. I work in the medical device industry and when there is a safety issue with your products - you initiate a RECALL. To date there has been no recall simply the TSB.   What is the NHTSA going to do about ensuring that GM, and other manufacturers, are making engines safe?   These engines can literally explode - sending metal shards through the engine into the passenger compartment.  INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)","products":[{"type":"Vehicle","productYear":"2025","productMake":"GMC","productModel":"SIERRA 1500","manufacturer":"General Motors, LLC"}]},{"odiNumber":11737689,"manufacturer":"General Motors, LLC","crash":false,"fire":false,"numberOfInjuries":0,"numberOfDeaths":0,"dateOfIncident":"05/01/2026","dateComplaintFiled":"05/13/2026","vin":"3GTUUEE8XSG","components":"POWER TRAIN","summary":"Truck does not automatically shift into park when the door is opened. Getting out of my truck, I forgot to shift into park and opened the door, and the truck moved forward with automatically shifting into park, or applying the parking brake. I have a 2015 Jeep Grand Cherokee that did the same thing. There was a safety recall set forth by the NHTSA to have the car go into park when the door opened to prevent someone for being run over by the vehicle. My 2025 GMC Sierra is experiencing the same issue. I was not harmed, but can definitely see someone getting hurt.","products":[{"type":"Vehicle","productYear":"2025","productMake":"GMC","productModel":"SIERRA 1500","manufacturer":"General Motors, LLC"}]},{"odiNumber":11737139,"manufacturer":"General Motors, LLC","crash":false,"fire":false,"numberOfInjuries":0,"numberOfDeaths":0,"dateOfIncident":"05/09/2026","dateComplaintFiled":"05/11/2026","vin":"3GTUUGEL5SG","components":"ENGINE","summary":"15000 miles and the engine spun a bearing and the engine blew","products":[{"type":"Vehicle","productYear":"2025","productMake":"GMC","productModel":"SIERRA 1500","manufacturer":"General Motors, LLC"}]},{"odiNumber":11735531,"manufacturer":"General Motors, LLC","crash":false,"fire":false,"numberOfInjuries":0,"numberOfDeaths":0,"dateOfIncident":"05/01/2026","dateComplaintFiled":"05/04/2026","vin":"3GTUUCED2SG","components":"ELECTRICAL SYSTEM,VEHICLE SPEED CONTROL,ENGINE","summary":"First occurrence was 02/27/2026 - onstar detecated a critical issue, the check esc, check tsc words came on in the center dash, then the orange lights came on and my truck went into limp mode at a stop light. I had to limp mode a mile to the nearest dealer. Where nothing was repaired just reset.   Second occurrence - exhaust flap valve failed creating chirping noise resulting in a muffler replacement on 04/28/2026 - picked the vehicle up on 04/30/2026  Third occurrence  - 05/01/2026 came out after a wedding to start my truck which it immediately repeated the first occurrence, check esc, check tsc with the orange lights and chugging. recorded on camera now the trucks been at the dealership awaiting updates.","products":[{"type":"Vehicle","productYear":"2025","productMake":"GMC","productModel":"SIERRA 1500","manufacturer":"General Motors, LLC"}]},{"odiNumber":11734260,"manufacturer":"General Motors, LLC","crash":false,"fire":false,"numberOfInjuries":0,"numberOfDeaths":0,"dateOfIncident":"04/27/2026","dateComplaintFiled":"04/28/2026","vin":"1GTUUHE83SZ","components":"ELECTRICAL SYSTEM","summary":"Got in started Truck and there is no Sound anywhere... none for blinkers, radio, warning lights if there to be any.  ZERO sounds.   This has been investigated by Hertrich Service--showed video of no sounds coming from truck speakers at all.  This is safety hazard with no audio warnings or blinkers, flasher sounds at all.","products":[{"type":"Vehicle","productYear":"2025","productMake":"GMC","productModel":"SIERRA 1500","manufacturer":"General Motors, LLC"}]},{"odiNumber":11733999,"manufacturer":"General Motors, LLC","crash":false,"fire":false,"numberOfInjuries":0,"numberOfDeaths":0,"dateOfIncident":"03/27/2026","dateComplaintFiled":"04/27/2026","vin":"","components":"TIRES","summary":"The contact owns a 2025 GMC 1500 equipped with Bridgestone Tires, Tire Line: Dueler, Tire Size: 275/60/R20. While washing the vehicle, the contact became aware that the sidewalls on all four tires were cracked. The tires were the original equipment. The dealer was contacted and made aware of the issue; however, the contact was informed that the tires were not under warranty. The tires were not replaced. The manufacturer was not informed of the failure. The approximate failure mileage was 12,000. The VIN was not available.","products":[{"type":"Vehicle","productYear":"2025","productMake":"GMC","productModel":"SIERRA 1500","manufacturer":"General Motors, LLC"},{"type":"Tire","productYear":"9999","productMake":"BRIDGESTONE","productModel":"DESERT DUELER","size":null,"manufacturer":"Bridgestone Americas Tire Operations"}]},{"odiNumber":11732667,"manufacturer":"General Motors, LLC","crash":false,"fire":false,"numberOfInjuries":0,"numberOfDeaths":0,"dateOfIncident":"01/15/2025","dateComplaintFiled":"04/21/2026","vin":"3GTPHGED5SG","components":"UNKNOWN OR OTHER","summary":"I did not receive an owners manual when my vehicle was purchased new on January 15 2025. I reported it to the dealership and to GMC both times they said too bad, access it online. I contacted GMC again after recall N252540430 was issued but they still refuse to provide an owners manual because 2025 Sierra 1500 isn't listed it's only the 26 model year.","products":[{"type":"Vehicle","productYear":"2025","productMake":"GMC","productModel":"SIERRA 1500","manufacturer":"General Motors, LLC"}]},{"odiNumber":11732418,"manufacturer":"General Motors, LLC","crash":false,"fire":false,"numberOfInjuries":0,"numberOfDeaths":0,"dateOfIncident":"03/10/2026","dateComplaintFiled":"04/20/2026","vin":"3GTUUEEL3SG","components":"ENGINE","summary":"I bought a brand-new GMC 1500 6.2L AT4 back in 2025. Never have an engine recall. At 39K miles, lost power, and ended up replacing the camshaft and lifters. 2K miles later went back to the dealer for engine replacement.","products":[{"type":"Vehicle","productYear":"2025","productMake":"GMC","productModel":"SIERRA 1500","manufacturer":"General Motors, LLC"}]},{"odiNumber":11732252,"manufacturer":"General Motors, LLC","crash":false,"fire":false,"numberOfInjuries":0,"numberOfDeaths":0,"dateOfIncident":"04/19/2026","dateComplaintFiled":"04/19/2026","vin":"3GTUUCED3SG","components":"UNKNOWN OR OTHER","summary":"Safety Complaint \u2013 Delayed Acceleration from Automatic Engine Stop/Start  I am reporting a safety concern regarding the automatic engine stop/start system in my GMC truck.  During normal operation, the system shuts the engine off when the vehicle comes to a complete stop. When I release the brake and press the accelerator, there is a noticeable delay while the engine restarts before power is delivered to the wheels. This creates a hesitation between driver input and vehicle response.  This delay presents a safety concern because it affects my ability to react quickly in situations that require immediate acceleration. I have experienced multiple real-world scenarios where this hesitation impacts safe operation:  While stopped at an intersection preparing to turn, I observed oncoming traffic approaching faster than expected. When I attempted to accelerate to complete the turn, the delay caused by the engine restart reduced my ability to clear the intersection promptly. In stop-and-go traffic, I needed to move forward quickly to maintain safe spacing or respond to changing traffic conditions. The hesitation before acceleration limited my ability to react immediately. When pulling into traffic from a parking lot or side street, heavy traffic often creates small gaps that require prompt acceleration. Due to the delay in engine restart, it is difficult to accurately gauge and anticipate the truck\u2019s response when pressing the accelerator. With this hesitation, safely merging into traffic in these conditions becomes extremely difficult and, at times, effectively impossible. In situations where a vehicle encroaches into my lane or a hazard develops unexpectedly, the delayed throttle response reduces my ability to maneuver out of the way quickly.  This is not simply a convenience issue. The system introduces a delay between driver input and vehicle response, which can reduce reaction time in situations where immediate acceleration is necessary to avoid a potential hazard.","products":[{"type":"Vehicle","productYear":"2025","productMake":"GMC","productModel":"SIERRA 1500","manufacturer":"General Motors, LLC"}]},{"odiNumber":11731504,"manufacturer":"General Motors, LLC","crash":false,"fire":false,"numberOfInjuries":0,"numberOfDeaths":0,"dateOfIncident":"04/09/2026","dateComplaintFiled":"04/16/2026","vin":"3GTUUGEL8SG","components":"ENGINE AND ENGINE COOLING","summary":"The contact owns a 2025 GMC Sierra 1500. The contact stated that while driving at an undisclosed speed, the engine made abnormal knocking sounds. No warning light was illuminated. The vehicle was taken to the dealer, who discovered metal shavings inside the engine oil and determined that the crankshaft bearings had failed. The contact was informed that the engine needed to be replaced. The vehicle was not yet repaired and remained with the dealer. The manufacturer was made aware of the failure. The failure mileage was 26,634.","products":[{"type":"Vehicle","productYear":"2025","productMake":"GMC","productModel":"SIERRA 1500","manufacturer":"General Motors, LLC"}]},{"odiNumber":11731660,"manufacturer":"General Motors, LLC","crash":false,"fire":false,"numberOfInjuries":0,"numberOfDeaths":0,"dateOfIncident":"04/05/2026","dateComplaintFiled":"04/16/2026","vin":"3GTUUDED8SG","components":"FORWARD COLLISION AVOIDANCE","summary":"I am reporting a serious safety issue involving unintended acceleration in my vehicle. The vehicle accelerates unexpectedly without driver input (specifically without pressing the \u201cresume\u201d function), requiring immediate braking to regain control. This issue has occurred numerous times over the past 4\u20135 months. Incidents have primarily happened at low speeds (approximately 20\u201325 mph or less), including while making turns, exiting parking lots, and once in our yard, where the vehicle nearly struck our home. The problem has occurred both when adaptive cruise control was active and when it was turned off. In the most recent incident, adaptive cruise control was off, and the vehicle suddenly accelerated while traveling in about 20\u201325 mph on the main street.  The driver had to apply the brakes forcefully to avoid a collision with the vehicle in front. There have been no warning lights, alerts, or messages prior to these events. During at least one incident, a \u201cbraking required\u201d message appeared only after the unintended acceleration had already begun. The vehicle has been taken to a GMC dealership multiple times, but the issue has not been duplicated by them. The dealer suggested the possibility of accidental activation of the \u201cresume\u201d button; however, this did not occur. The vehicle is currently at the dealership (since April 6) and is available for inspection. This defect presents a significant safety hazard to the occupants of the vehicle and to others on the road.","products":[{"type":"Vehicle","productYear":"2025","productMake":"GMC","productModel":"SIERRA 1500","manufacturer":"General Motors, LLC"}]},{"odiNumber":11728395,"manufacturer":"General Motors, LLC","crash":false,"fire":false,"numberOfInjuries":0,"numberOfDeaths":0,"dateOfIncident":"03/31/2026","dateComplaintFiled":"03/31/2026","vin":"3GTUUEE81SG","components":"ELECTRICAL SYSTEM,SERVICE BRAKES","summary":"I stopped at a stoplight and my truck shut off, the doors unlocked and then immediately restarted and then came up with a bunch of errors telling me that my brake system failed and to get the traction control serviced. I then had no power braking. This is the second time my truck has shut off at a light and restarted, but I don\u2019t lose my brakes the first time.","products":[{"type":"Vehicle","productYear":"2025","productMake":"GMC","productModel":"SIERRA 1500","manufacturer":"General Motors, LLC"}]},{"odiNumber":11728038,"manufacturer":"General Motors, LLC","crash":false,"fire":false,"numberOfInjuries":0,"numberOfDeaths":0,"dateOfIncident":"03/26/2026","dateComplaintFiled":"03/30/2026","vin":"3GTUUEEL0SG","components":"ENGINE","summary":"I was traveling on the I70 West around the 210 mile marker. I was in the passing lane at high speed when the vehicle without warning switched itself off. The dash showed the \u201cpress start\u201d warning, but the vehicle would not restart. I was fortunate that I was around 1/2 a mile from a rest stop area. I was able to glide the vehicle into the rest area. As I slowed close to a stop the vehicle suddenly stopped and applied the park brake. I am a very experienced driver, if my wife was driving, the vehicle shutting down completely in the fast lane could have been catastrophic. The road was busy. The vehicle was locked up in Park and was unrecoverable. It had to be dragged sideways out of the area that it had come to a stop, and then dragged onto and off the tow truck. The following morning the dealership confirmed the engine was seized. When I purchased the vehicle, the dealership confirmed that the historic failures on the L87 6.2L V8 engine were resolved. Clearly not the case.","products":[{"type":"Vehicle","productYear":"2025","productMake":"GMC","productModel":"SIERRA 1500","manufacturer":"General Motors, LLC"}]},{"odiNumber":11721745,"manufacturer":"General Motors, LLC","crash":false,"fire":false,"numberOfInjuries":0,"numberOfDeaths":0,"dateOfIncident":"02/05/2026","dateComplaintFiled":"03/03/2026","vin":"1GTUUCE86SZ","components":"ENGINE","summary":"What component or system failed or malfunctioned, and is it available for inspection upon request? ENGINE FAILURE- CRANKSHAFT ENDPLAY WAY OUT OF SPECS.  How was your safety or the safety of others put at risk? HIGH POTENTIAL FOR ENGINE FAILURE WHILE OPERATING VEHICLE.  Has the problem been reproduced or confirmed by a dealer or independent service center? SPECIFIC ISSUE WAS DIAGNOSED AT A GM DEALER-   Has the vehicle or component been inspected by the manufacturer, police, insurance representatives or others? GM DEALER ONLY-NO ADDITIONAL INSPECTIONS PERFORMED.  Were there any warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear? NO WARNING LIGHTS EVER DISPLAYED, ONLY EXCESSIVE ENGINE NOISE. SYMPTONS BEGAN AROUND 6,900 MILES","products":[{"type":"Vehicle","productYear":"2025","productMake":"GMC","productModel":"SIERRA 1500","manufacturer":"General Motors, LLC"}]},{"odiNumber":11720880,"manufacturer":"General Motors, LLC","crash":false,"fire":false,"numberOfInjuries":0,"numberOfDeaths":0,"dateOfIncident":"12/17/2025","dateComplaintFiled":"02/27/2026","vin":"1GTUUBED1SZ","components":"VISIBILITY","summary":"The contact owns a 2025 GMC Sierra 1500. The contact stated that while the defroster was activated to clear the windshield, the blower vents on the passenger\u2019s side started making an abnormal hissing sound, and air produced by the blower motor decreased and was inadequate to clear the windshield. There was no warning light illuminated. The contact stated that the failure occurred while there was light snow covering the hood and on the outside vents underneath the windshield. The contact had taken the vehicle to a local dealer several times, and the dealer was unable to duplicate the failure. The vehicle was not repaired. The manufacturer was not informed of the failure. The failure mileage was approximately 3,000.","products":[{"type":"Vehicle","productYear":"2025","productMake":"GMC","productModel":"SIERRA 1500","manufacturer":"General Motors, LLC"}]},{"odiNumber":11720526,"manufacturer":"General Motors, LLC","crash":false,"fire":false,"numberOfInjuries":0,"numberOfDeaths":0,"dateOfIncident":"11/20/2025","dateComplaintFiled":"02/25/2026","vin":"3GTUUDED6SG","components":"ELECTRICAL SYSTEM,ENGINE","summary":"The contact owns a 2025 GMC Sierra 1500. The contact stated that while stopped at a traffic light, the gear shifter was shifted to park(P) and the vehicle stalled. The message \"START Engine\" was displayed. The vehicle was restarted, and the Auto START/STOP feature was disabled by pressing the \"A\" inside an orange circle. The contact stated that on another occasion while reversing into the driveway, the vehicle stalled. The message \"START Engine\" was displayed on the screen. The dealer was contacted; however, the vehicle was not taken to the dealer or an independent mechanic. The vehicle was not repaired and the failure persisted. The manufacturer was not notified of the failure. The failure mileage was approximately 16,000.","products":[{"type":"Vehicle","productYear":"2025","productMake":"GMC","productModel":"SIERRA 1500","manufacturer":"General Motors, LLC"}]},{"odiNumber":11719889,"manufacturer":"General Motors, LLC","crash":false,"fire":false,"numberOfInjuries":0,"numberOfDeaths":0,"dateOfIncident":"02/18/2026","dateComplaintFiled":"02/23/2026","vin":"1GTUUEEL5SZ","components":"ENGINE","summary":"2025 GMC Sierra 6.2 L V8 engine failed by locking up or seizing.  Heard pinging / knocking sounds while driving 3 miles from my home to the dealer.  Engine shut off without warning, vehicle shifted to Neutral.  Coasted to a stop, attempted to restart the engine, would only crank.  Dealer diagnosis is that the engine will need to be replaced.  Sounds just like the 2021 - 2024 GM recall for this same engine.  Vehicle has 11,670 miles on it.    Safety risk:  Loss of ALL power while driving. No Warning lamps or messages prior to engine failure.","products":[{"type":"Vehicle","productYear":"2025","productMake":"GMC","productModel":"SIERRA 1500","manufacturer":"General Motors, LLC"}]},{"odiNumber":11719572,"manufacturer":"General Motors, LLC","crash":false,"fire":false,"numberOfInjuries":0,"numberOfDeaths":0,"dateOfIncident":"02/12/2026","dateComplaintFiled":"02/21/2026","vin":"3gtuuee80sg","components":"ENGINE","summary":"was driving truck and reduced acceleration drive with care comes up on dash pull over shut truck off start truck warning gone in 30sec back on and repeat drive off again then truck shut off while driving and try to start again and the dash went black motor did not turn over then tried again and same thing called tow company and had towed to dealership. dealership said it had 2 pages of codes and now needs a new motor........ no estimated time on getting my truck back","products":[{"type":"Vehicle","productYear":"2025","productMake":"GMC","productModel":"SIERRA 1500","manufacturer":"General Motors, LLC"}]},{"odiNumber":11718850,"manufacturer":"General Motors, LLC","crash":false,"fire":false,"numberOfInjuries":0,"numberOfDeaths":0,"dateOfIncident":"01/01/2026","dateComplaintFiled":"02/18/2026","vin":"1gtuuhe86sz","components":"FORWARD COLLISION AVOIDANCE","summary":"Car flashes \"service driver assist system\". Took to dealer and they referenced PIT6455 which states GM is still investigating the issue. Truck was returned to me - very concerning to have truck saying driver assist needs to be serviced and GM is unable to service it!","products":[{"type":"Vehicle","productYear":"2025","productMake":"GMC","productModel":"SIERRA 1500","manufacturer":"General Motors, LLC"}]},{"odiNumber":11718238,"manufacturer":"General Motors, LLC","crash":false,"fire":false,"numberOfInjuries":0,"numberOfDeaths":0,"dateOfIncident":"12/02/2025","dateComplaintFiled":"02/16/2026","vin":"3GTUUDEL5SG","components":"ELECTRICAL SYSTEM","summary":"This happens many times, at random intervals, and sometimes it does not happen at all, but I would say about 33% of the time, it happens.   When you put the vehicle into reverse, the side mirrors will lower slightly, so that its easy to see the ground, or parking lines, etc.   When you then go back to park or forward gear,  the mirrors are supposed to go back to the position they were earlier.  The original starting point.   But that's the problem,  many times, they do not go back to the starting position and you must then push the preset buttons to make them go back to your desired view angle.","products":[{"type":"Vehicle","productYear":"2025","productMake":"GMC","productModel":"SIERRA 1500","manufacturer":"General Motors, LLC"}]},{"odiNumber":11718159,"manufacturer":"General Motors, LLC","crash":false,"fire":false,"numberOfInjuries":0,"numberOfDeaths":0,"dateOfIncident":"12/15/2025","dateComplaintFiled":"02/15/2026","vin":"1GTRHAED0SZ","components":"POWER TRAIN","summary":"The truck keeps wanting to engage two gears acceleration and deceleration and still is happening i have taken it to the dealership an they can not find a problem took it home an its happening again so now its back at the shop now I'm waiting to hear back from them so this is the second time to the dealership","products":[{"type":"Vehicle","productYear":"2025","productMake":"GMC","productModel":"SIERRA 1500","manufacturer":"General Motors, LLC"}]},{"odiNumber":11717554,"manufacturer":"General Motors, LLC","crash":false,"fire":false,"numberOfInjuries":0,"numberOfDeaths":0,"dateOfIncident":"08/10/2025","dateComplaintFiled":"02/12/2026","vin":"1GTUUGEL2SZ","components":"ENGINE","summary":"2025 GMC Sierra 1500 has had 2 engine failures since purchase date June 2025.  Engine failed on a road trip with my family, leaving me stranded for hours. After the problem being resolved, engine failed once again after 5 months. On the dash it said loss of power and wouldn\u2019t crank to turn ON","products":[{"type":"Vehicle","productYear":"2025","productMake":"GMC","productModel":"SIERRA 1500","manufacturer":"General Motors, LLC"}]},{"odiNumber":11715737,"manufacturer":"General Motors, LLC","crash":false,"fire":false,"numberOfInjuries":0,"numberOfDeaths":0,"dateOfIncident":"02/01/2026","dateComplaintFiled":"02/05/2026","vin":"1gtuude88sz","components":"POWER TRAIN,ENGINE","summary":"I was driving and the engine abruptly stalled. The truck self-shifted to Neutral. Once stopped, I shifted to Park to attempt a restart. It would not crank. I was on a 2-lane road so I did not have a shoulder.  Once I realized it would not restart I tried to shift to Neutral so I could push it to a subdivision road about 50 yards away only to find out my transmission has no ability to shift to Neutral (the dealer confirmed this later). So I was stuck on the road for hours just over the crest of a hill with people coming up on me and my family at 50mph.  It was a windy 10 degrees so we could not wait on the side of the road where we would have been safer.  This is how people get killed; being stopped where people can't see you and do not expect you to be stopped.  Why can I not get the truck off the road?  If this happened on an 8-lane highway how would I get to a shoulder, even after traffic had stopped behind me?  On top of all that, the problem with the truck ended up being an engine bearing failure (per the dealership service dept) that is a known problem with this engine and truck build date.  General Motors needs to proactively diagnose and get these engines replaced before someone gets hurt.  There is a TSB issued for the bearing issue but when I asked my dealer about it a month ago, before the failure, they acted like they knew nothing about it and told me to bring it in if I hear noises.  If they had offered to check the crankshaft endplay when I asked about it ( as the TSB suggests), I may not have gotten stranded and my family's safety put at risk.  There were no warning lamps, and no strange noises before the engine seized.  My fuel economy had decreased by about 20% in the last month but that may be from cold weather operating conditions.  I have a separate electrical issue that I've been chasing down and I assumed this stall condition was related to that.  But the dealer confirmed this was a bearing failure.","products":[{"type":"Vehicle","productYear":"2025","productMake":"GMC","productModel":"SIERRA 1500","manufacturer":"General Motors, LLC"}]},{"odiNumber":11713989,"manufacturer":"General Motors, LLC","crash":false,"fire":false,"numberOfInjuries":0,"numberOfDeaths":0,"dateOfIncident":"12/12/2025","dateComplaintFiled":"01/28/2026","vin":"3GTUUFE81SG","components":"STEERING,ELECTRICAL SYSTEM","summary":"Heated steering wheel reaches temps of 137 - 143 degrees.  Should have the ability for the owner to select a lower temperature setting the same as the heated seats.","products":[{"type":"Vehicle","productYear":"2025","productMake":"GMC","productModel":"SIERRA 1500","manufacturer":"General Motors, LLC"}]},{"odiNumber":11711937,"manufacturer":"General Motors, LLC","crash":false,"fire":false,"numberOfInjuries":0,"numberOfDeaths":0,"dateOfIncident":"08/09/2025","dateComplaintFiled":"01/19/2026","vin":"3GTUUDEL2SG","components":"ENGINE","summary":"I have the 6.2 L87 with the 10 speed transmission in my 2025 Sierra. At cold start, when auto stop restarts the truck,  when the truck downshifts under 20 mph down to 12 mph the engine or transmission makes a chirping/squeak/squeal sounds. Several repair attempts have been made, parts replaced. According to GM and their \u201cfield engineer\u201d this is a \u201cnormal characteristic of the dfm system\u201d. They claim that it has to do with ignition timing. Not my first dfm truck, but it is the first to make this noise. There is  not very many components in \u201cthe dfm system\u201d that can make a metal on metal squeak/chirp/squeal sound other than lifters/pushrods, but the noise could be coming from the transmission/bell housing area.  I am fairly certain this is an early warning sign of engine or transmission failure.  Truck currently has 7,800 miles. If this was an actual \u201cnormal behavior\u201d for this engine, all of them would make the same noise.  But out of 7 other trucks with the same engine and transmission that i have started/drove, none of them made the noise. It has made this noise since i purchased it brand new. A Gm field engineer \u201clooked\u201d at the truck 3 weeks ago, and I still have not received any paperwork on what they actually did when diagnosing it. Not a single document from the dealership or GM, regarding the 4 days that my truck was at the dealership on the 4th repair attempt.  Gm technical service bulletin I was referred to by the dealership is 22-NA-218 Will update this complaint when failure occurs.","products":[{"type":"Vehicle","productYear":"2025","productMake":"GMC","productModel":"SIERRA 1500","manufacturer":"General Motors, LLC"}]},{"odiNumber":11711646,"manufacturer":"General Motors, LLC","crash":false,"fire":false,"numberOfInjuries":0,"numberOfDeaths":0,"dateOfIncident":"12/29/2025","dateComplaintFiled":"01/17/2026","vin":"1GTUUEE80SZ","components":"POWER TRAIN,ENGINE","summary":"I bought my truck new in June 2025. On the night of December 29, 2025, with around 9,300 miles on the odometer, I began to hear a knocking sound coming from the engine while I was driving it back to my house from my mother's house. The sound got progressively louder and louder. The truck eventually displayed a \"reduced acceleration drive with care\" warning. I thought catastrophic engine failure was imminent and did not believe I could make it home. I called my in-laws (they were closer to my location than my house), agreed to park it there overnight, and thankfully made it to their house. The next day the truck was towed to the GMC dealership. A week later, GMC diagnosed this issue as a thrust bearing/crankshaft issue and agreed to replace the entire engine. A crankshaft issue in a new diesel engine should not occur, yet it did. My vehicle is currently being repaired, so the dealership said they had no repair records to provide me. This is the link to the video of the sound it was making after I made it to the in-laws:   [XXX]   I had just dropped off my [XXX]  child with my mother about twenty minutes earlier. I was extremely close to being stranded on the side of the highway at night in the December cold with a [XXX]  baby. Thankfully, that did not happen, but it was a close call. My cousin also has had a similar issue with the exact same make and model of his truck. I believe this engine is not being manufactured according to the design specifications and it is a danger to the public until the manufacturing issue with the supplier is adequately corrected.  INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)","products":[{"type":"Vehicle","productYear":"2025","productMake":"GMC","productModel":"SIERRA 1500","manufacturer":"General Motors, LLC"}]},{"odiNumber":11711411,"manufacturer":"General Motors, LLC","crash":false,"fire":false,"numberOfInjuries":0,"numberOfDeaths":0,"dateOfIncident":"01/07/2026","dateComplaintFiled":"01/16/2026","vin":"1GTUUHE81SZ","components":"VEHICLE SPEED CONTROL,FORWARD COLLISION AVOIDANCE","summary":"Cruise control activates at speeds below 2 mph which frequently happens while turning or parking.  The cruise control activates by a toggle on the left spoke of the steering wheel which can be easily bumped while doing low speed maneuvers like parking.  When bumping the toggle the cruise indicator shows a set speed of 15mph and the vehicle surges forward trying to attain that speed.  Since this occurs while maneuvering to park, it creates a dangerous situation if anyone is nearby and you are unable to react in time.  This is an ongoing problem that can be duplicated at will.","products":[{"type":"Vehicle","productYear":"2025","productMake":"GMC","productModel":"SIERRA 1500","manufacturer":"General Motors, LLC"}]},{"odiNumber":11711558,"manufacturer":"General Motors, LLC","crash":false,"fire":false,"numberOfInjuries":0,"numberOfDeaths":0,"dateOfIncident":"01/10/2026","dateComplaintFiled":"01/16/2026","vin":"3GTUUEE84SG","components":"ENGINE","summary":"Driving at highway speed engine lost most power (limp mode), was able to get to an exit at low speed with flashers on but was creating a hazard on busy interstate.  Dealer diagnosed truck needs new 3.0 liter duramax engine per GM TSB 25-NA-307, bad thrust bearing.","products":[{"type":"Vehicle","productYear":"2025","productMake":"GMC","productModel":"SIERRA 1500","manufacturer":"General Motors, LLC"}]},{"odiNumber":11710304,"manufacturer":"General Motors, LLC","crash":false,"fire":false,"numberOfInjuries":0,"numberOfDeaths":0,"dateOfIncident":"01/08/2026","dateComplaintFiled":"01/12/2026","vin":"3GTUUDE89SG","components":"ENGINE","summary":"With approximately 5,200 miles on my new vehicle, received an error message on the dash while driving on 1/8/2026 that read \u201cReduced acceleration; Drive with care\u201d. I immediately took the vehicle to a local GM dealership and was informed on 1/9/2026 that due to a faulty thrust bearing (covered under the non-mandatory technical service bulletin 25-NA-307), the entire engine sustained a catastrophic failure and that the engine \u201ctanked itself\u201d and \u201cgrenaded itself\u201d. Driving with the reduced acceleration mode active is beyond frightening as it\u2019s very difficult to navigate traffic intersections in time to avoid oncoming traffic. It was also noted that it other cases where this faulty part causes the engine to totally fail, the vehicle becomes unusable at that point.   I was informed that a replacement motor is not expected from General Motors for at least 2-3 months as this is becoming a more prevalent issue with certain 2025 Sierra\u2019s with the 3.0 Duramax diesel motor.","products":[{"type":"Vehicle","productYear":"2025","productMake":"GMC","productModel":"SIERRA 1500","manufacturer":"General Motors, LLC"}]},{"odiNumber":11709368,"manufacturer":"General Motors, LLC","crash":false,"fire":false,"numberOfInjuries":0,"numberOfDeaths":0,"dateOfIncident":"12/12/2025","dateComplaintFiled":"01/07/2026","vin":"3GTUUGEL5SG","components":"ENGINE AND ENGINE COOLING,VISIBILITY","summary":"The contact owns a 2025 GMC Sierra 1500. The contact stated that while driving at 35 MPH, there was an abnormal knocking sound coming from the engine. No warning lights were illuminated. The vehicle was towed to the dealer, where it was diagnosed with a rough idle code, and that the thermostat coolant housing had failed. The contact was provided DTC codes: B1A76 with failure Code 0X15 (pending), P05D, U0075, U0101, U0146, U020C, U0265, U1614, and U1616, and the codes were active. The vehicle was repaired. The contact picked up the vehicle from the dealer after hours, and when the contact started the vehicle, the abnormal knocking sound was still coming from the engine. No warning lights were illuminated. The contact stated that when the A/C was turned off, the abnormal sound ceased. Additionally, the contact performed the oil changes on the vehicle and noticed that the engine was consuming an excessive amount of engine oil. The contact stated that there were no oil stains on the ground. The contact needed to add oil every 800 to 1,000 miles driven. The vehicle was taken to O'Reilly's Chevrolet, located at 6160 E Broadway Blvd, Tucson, AZ, for a diagnostic test, and it was determined that the air compressor had failed. The vehicle was not repaired. The vehicle remained at the dealer pending the repair. The contact stated that when the A/C was activated, the knocking sound in the engine compartment returned. The manufacturer was not made aware of the failure. The failure mileage was approximately 18,000.","products":[{"type":"Vehicle","productYear":"2025","productMake":"GMC","productModel":"SIERRA 1500","manufacturer":"General Motors, LLC"}]},{"odiNumber":11708721,"manufacturer":"General Motors, LLC","crash":false,"fire":false,"numberOfInjuries":0,"numberOfDeaths":0,"dateOfIncident":"12/09/2025","dateComplaintFiled":"01/05/2026","vin":"3GTUUDEL2SG","components":"VISIBILITY/WIPER","summary":"If truck has a \u201cdusting of snow\u201d on it, blower motor for defrost and heat retracts to absolute \u201clow\u201d setting to supposedly protect the blower motor. Have been caught driving in snow, and defrost couldn\u2019t keep up with keeping windshield defrosted due to this behavior.  Had to pull over on expressway to clean vents on the cowl from snow in order for the defrost to work properly.  According to GM, this is normal behavior.  In fact this is extremely dangerous and should be investigated and a recall to repair should be made. Having to pull over to remove snow from the cowl, open the hood to clear the other vents is not safe.","products":[{"type":"Vehicle","productYear":"2025","productMake":"GMC","productModel":"SIERRA 1500","manufacturer":"General Motors, LLC"}]},{"odiNumber":11707086,"manufacturer":"General Motors, LLC","crash":false,"fire":false,"numberOfInjuries":0,"numberOfDeaths":0,"dateOfIncident":"12/09/2024","dateComplaintFiled":"12/26/2025","vin":"3GTUUDED0SG","components":"VISIBILITY/WIPER,LANE DEPARTURE,BACK OVER PREVENTION","summary":"I own a 2025 GMC Sierra 1500. The rearview camera is inoperable at night (image is too dark). Brought vehicle into to purchasing dealer with complaint. After service, I was told that there was nothing they could do to correct the issue. I then contacted GMC customer service. They advised to bring the vehicle to a different dealer and upon completion to contact customer service again. I did as advised and took the vehicle to a second dealership with the same result. As you are aware, this is a violation of federal law and a serious safety issue for  small children, pets or any object behind the vehicle in the dark. Based on what I have been able to discover there are many people with this same complaint. GM is not addressing this issue and is as unwilling to assist others as they have been to assist me.","products":[{"type":"Vehicle","productYear":"2025","productMake":"GMC","productModel":"SIERRA 1500","manufacturer":"General Motors, LLC"}]},{"odiNumber":11707169,"manufacturer":"General Motors, LLC","crash":false,"fire":false,"numberOfInjuries":0,"numberOfDeaths":0,"dateOfIncident":"10/20/2025","dateComplaintFiled":"12/26/2025","vin":"1GTUUCE80SZ","components":"ENGINE","summary":"Vehicle purchased 8/31/2025  October 20, 2025 \"reduced acceleration\" alert while driving on why up a significant grade with no way to pull off to the side of the road.  Speed limitied to 35mph.  Stopped by dealership pulled PO6DD code.  Appointment made for November 12th.   November 12, 2025 routine oil change and service noted \"unable to duplicate concern on vehicly, currently no P06DD is present only DTC that was found in history was U1643 Lost communications with transmission control module can bus 2. cleared DTCs and test drove vehicle and is operating normal no issues. unable to duplicate.\"  December 4th, 2025 driving on interstate and \"reduced acceleration\" alert...pulled into nearest dealer and code \"P06DD\" pulled.    December 5th, 2025 returned to home dealership \"Found Code P06DD. As per TSB#25-NA-307, checked the crankshaft end play, found the crankshaft has excessive end play.  This is an indication of a worn thrust bearing. As per TSB engine Replacement is required.\"  Vehicle currently has 6,800 miles.","products":[{"type":"Vehicle","productYear":"2025","productMake":"GMC","productModel":"SIERRA 1500","manufacturer":"General Motors, LLC"}]},{"odiNumber":11706325,"manufacturer":"General Motors, LLC","crash":false,"fire":false,"numberOfInjuries":0,"numberOfDeaths":0,"dateOfIncident":"11/26/2025","dateComplaintFiled":"12/20/2025","vin":"3GTUUGED8SG","components":"ELECTRICAL SYSTEM,UNKNOWN OR OTHER","summary":"Onstar telecommunications module failed within 5 months of ownership.  GPS and in car navigation goes crazy showing incorrect position which is distracting on the infotainmet screen.  Been almost 4 weeks with no estimate of part availability from GM.","products":[{"type":"Vehicle","productYear":"2025","productMake":"GMC","productModel":"SIERRA 1500","manufacturer":"General Motors, LLC"}]},{"odiNumber":11704518,"manufacturer":"General Motors, LLC","crash":false,"fire":false,"numberOfInjuries":0,"numberOfDeaths":0,"dateOfIncident":"12/06/2025","dateComplaintFiled":"12/11/2025","vin":"3GTUUFE81SG","components":"STEERING","summary":"Heated steering wheel gets so hot it almost burns to touch it.  IR Thermometer readings at the 10 and 2 o'clock positions read between 119 and 125 degrees Fahrenheit.  Bottom of the steering wheel is 127-130 degrees.  Have made an appointment to have the dealer check for issues.","products":[{"type":"Vehicle","productYear":"2025","productMake":"GMC","productModel":"SIERRA 1500","manufacturer":"General Motors, LLC"}]},{"odiNumber":11703746,"manufacturer":"General Motors, LLC","crash":false,"fire":false,"numberOfInjuries":0,"numberOfDeaths":0,"dateOfIncident":"12/05/2025","dateComplaintFiled":"12/08/2025","vin":"3GTUUDED2SG","components":"POWER TRAIN,FORWARD COLLISION AVOIDANCE","summary":"The contact owns a 2025 GMC Sierra 1500. The contact stated that while driving  75 MPH with the cruise control activated, the vehicle failed to accelerate as intended while depressing the accelerator pedal, and the vehicle decelerated to 10 MPH. In addition, the vehicle came to an abrupt stop independently. The contact\u2019s upper body almost struck the front windshield. There was no warning light illuminated. The contact stated that shortly afterwards, the vehicle resumed driving normally at 75 MPH; however, the failure reoccurred after a short distance. The vehicle failed to accelerate as intended while depressing the accelerator pedal and abruptly came to a stop. The vehicle then resumed driving normally. No warning lights were illuminated. The contact arrived at the residence, and the vehicle was towed to the dealer. The vehicle remained at the dealer awaiting a diagnostic test. The manufacturer was not made aware of the failure. The approximate failure mileage was 7,800.","products":[{"type":"Vehicle","productYear":"2025","productMake":"GMC","productModel":"SIERRA 1500","manufacturer":"General Motors, LLC"}]},{"odiNumber":11702444,"manufacturer":"General Motors, LLC","crash":false,"fire":false,"numberOfInjuries":0,"numberOfDeaths":0,"dateOfIncident":"11/10/2025","dateComplaintFiled":"12/02/2025","vin":"3GTUUEE82SG","components":"ENGINE","summary":"Truck started with a knocking noise in the engine that developed into a grinding noise. Dealer Service Department inspected and did a transmission tear down only to discover the issue is with the excessive play in the crankshaft. At 13K miles, the service department has stated the entire engine needs to be replaced.","products":[{"type":"Vehicle","productYear":"2025","productMake":"GMC","productModel":"SIERRA 1500","manufacturer":"General Motors, LLC"}]},{"odiNumber":11701927,"manufacturer":"General Motors, LLC","crash":false,"fire":false,"numberOfInjuries":0,"numberOfDeaths":0,"dateOfIncident":"11/05/2025","dateComplaintFiled":"11/28/2025","vin":"3GTUUGEL1SG","components":"POWER TRAIN","summary":"Intermittent shudder at 25-55 mph under light throttle (rumble-strip feel); 5-6 dealer attempts failed due to non-duplication; GMC corporate (case # 82769068] refused escalation. Safety risk: Distracts from road, potential loss of control.TSB 22-NA-182 is a known issue and dealer says they can\u2019t repair without duplication.","products":[{"type":"Vehicle","productYear":"2025","productMake":"GMC","productModel":"SIERRA 1500","manufacturer":"General Motors, LLC"}]},{"odiNumber":11701346,"manufacturer":"General Motors, LLC","crash":false,"fire":false,"numberOfInjuries":0,"numberOfDeaths":0,"dateOfIncident":"11/18/2025","dateComplaintFiled":"11/24/2025","vin":"3GTUUDED7SG","components":"UNKNOWN OR OTHER,LANE DEPARTURE","summary":"While driving in bumper-to-bumper traffic, my vehicle suddenly lost all engine power, the accelerator became unresponsive and the dash indicated \"press start\". There were no warning lights, no messages, and no prior symptoms before the failure occurred. I was in an active traffic lane when this happened, which immediately placed me and others at risk of being rear-ended. After several seconds, and pressing the start button, the vehicle regained power. But the odometer was indicating I was going 30+ mph when I was going less than 10 mph, so I pulled over to the side of the road.   The vehicle is also was having issues with the lane keeping assistance was unavailable. This is is a new vehicle purchase directly from the dealer in August 2025, with approximately 4,500 miles at the time of the incident that occurred on, 11/18.   The problem has not been reproduced by the dealership, and no diagnostic trouble codes were found. The vehicle has been at the dealer for inspection since 11/20, but I was informed that the issue would need to happen again before they could diagnose it. This type of sudden power loss while driving is a serious safety concern, especially because it occurred without warning and could happen again unpredictably.    At this time, the cause it UNKNOWN, but the component or system responsible for the power loss should be inspected. The failure appears to be intermittent and without warning.","products":[{"type":"Vehicle","productYear":"2025","productMake":"GMC","productModel":"SIERRA 1500","manufacturer":"General Motors, LLC"}]},{"odiNumber":11698927,"manufacturer":"General Motors, LLC","crash":false,"fire":false,"numberOfInjuries":0,"numberOfDeaths":0,"dateOfIncident":"10/29/2025","dateComplaintFiled":"11/12/2025","vin":"1GTUUGE81SZ","components":"ENGINE","summary":"We were traveling when it went into limp mode slowing our speed way down. We got it to a dealership and they determined low oil pressure and metal in the oil. My vehicle only has 1185 miles on it.","products":[{"type":"Vehicle","productYear":"2025","productMake":"GMC","productModel":"SIERRA 1500","manufacturer":"General Motors, LLC"}]},{"odiNumber":11698822,"manufacturer":"General Motors, LLC","crash":false,"fire":false,"numberOfInjuries":0,"numberOfDeaths":0,"dateOfIncident":"11/10/2025","dateComplaintFiled":"11/11/2025","vin":"1GTUUCED5SZ","components":"POWER TRAIN","summary":"Transmission module went out at 20,989 miles.","products":[{"type":"Vehicle","productYear":"2025","productMake":"GMC","productModel":"SIERRA 1500","manufacturer":"General Motors, LLC"}]},{"odiNumber":11698403,"manufacturer":"General Motors, LLC","crash":false,"fire":false,"numberOfInjuries":0,"numberOfDeaths":0,"dateOfIncident":"11/06/2025","dateComplaintFiled":"11/09/2025","vin":"1GTUUHEL4SZ","components":"ENGINE","summary":"I got 3200 miles on my 2025 gmc 1500 6.2 engine. The engine crash. Knocking.  Skund like its going to jump out.   Been at dealer in columbus. Since Thursday. No one touch it","products":[{"type":"Vehicle","productYear":"2025","productMake":"GMC","productModel":"SIERRA 1500","manufacturer":"General Motors, LLC"}]},{"odiNumber":11696564,"manufacturer":"General Motors, LLC","crash":false,"fire":false,"numberOfInjuries":0,"numberOfDeaths":0,"dateOfIncident":"02/01/2025","dateComplaintFiled":"10/30/2025","vin":"1GTRHAEK9SZ","components":"VEHICLE SPEED CONTROL","summary":"The contact owns a 2025 GMC Sierra 1500. The contact stated that while tapping the accelerator pedal, the vehicle suddenly accelerated. The contact stated that the tires were squealing. The contact drove over a cement barrier after depressing the accelerator pedal. There were no warning lights illuminated. The local dealer was contacted. The vehicle was not diagnosed or repaired. The manufacturer was contacted but no assistance was provided. The failure mileage was approximately 7,800.","products":[{"type":"Vehicle","productYear":"2025","productMake":"GMC","productModel":"SIERRA 1500","manufacturer":"General Motors, LLC"}]},{"odiNumber":11695954,"manufacturer":"General Motors, LLC","crash":false,"fire":false,"numberOfInjuries":0,"numberOfDeaths":0,"dateOfIncident":"02/20/2025","dateComplaintFiled":"10/27/2025","vin":"1GTUUHEL2SZ","components":"ELECTRICAL SYSTEM,BACK OVER PREVENTION,FORWARD COLLISION AVOIDANCE","summary":"My vehicle is equipped with multiple safety systems offered by general motors. Since purchasing my vehicle new, I have had a persistent and recurring issue related to the vehicle safety system, which is resulted in numerous collision detection and advanced cruise control service is not functioning as designed, creating safety issues for both myself and potentially other motorist on the road. Additionally, the parking sensors are not working as expected, presumably due to the same issue, which has resulted in numerous safety concerns, including the detection of vehicles or objects, which were not present, resulting in the systematic breaking function engaging posing a risk to myself and surrounding motorists. I initially reported the issue to GM on 2/20/2025, when the vehicle had 467 miles on the odometer. Since the issue initially began, I have returned to the GM service department at my local dealer a total of seven (7) times. The local service department has been in contact with GM corporate office related to the issue, however, they have been unable to rectify the issue and continue to send the vehicle back out on the road claiming the issue has been resolved only for it to recur shortly thereafter. I believe that GM providing the safety features in an inoperable state poses great risk to the general public, and the NHTSA should investigate this issue alongside the other active systemic issues GM is currently under investigation of. At this time, it is unknown what is the cause of the issue, multiple parts have been replaced, and the true cause of the issue has been undiagnosed.","products":[{"type":"Vehicle","productYear":"2025","productMake":"GMC","productModel":"SIERRA 1500","manufacturer":"General Motors, LLC"}]},{"odiNumber":11695335,"manufacturer":"General Motors, LLC","crash":false,"fire":false,"numberOfInjuries":0,"numberOfDeaths":0,"dateOfIncident":"10/23/2025","dateComplaintFiled":"10/23/2025","vin":"1GTUUHEL7SZ","components":"ELECTRICAL SYSTEM","summary":"The vehicle will loose all interior audio to include stereo, turn signals, and all other audio safety features for several hours at a time. GMC has done three repairs and still no resolution. Lack on audio impacts the safety of the vehicle. Has happened dozens of times and appears to be larger GM issue that is u resolved. Has occurred at least 20 times since I bought the vehicle 10 months ago.","products":[{"type":"Vehicle","productYear":"2025","productMake":"GMC","productModel":"SIERRA 1500","manufacturer":"General Motors, LLC"}]},{"odiNumber":11693732,"manufacturer":"General Motors, LLC","crash":false,"fire":false,"numberOfInjuries":0,"numberOfDeaths":0,"dateOfIncident":"07/15/2025","dateComplaintFiled":"10/16/2025","vin":"1GTUUGEL5SZ","components":"EXTERIOR LIGHTING","summary":"Backup camera is not usable at night, you cannot see anything on the camera unless it is a brightly it area. This causes safety concern for people and property. Dealer confirmed no issues with the camera and that is how it is. Had to add external light to ensure I could see at night.","products":[{"type":"Vehicle","productYear":"2025","productMake":"GMC","productModel":"SIERRA 1500","manufacturer":"General Motors, LLC"}]},{"odiNumber":11693775,"manufacturer":"General Motors, LLC","crash":false,"fire":false,"numberOfInjuries":0,"numberOfDeaths":0,"dateOfIncident":"10/13/2025","dateComplaintFiled":"10/16/2025","vin":"1GTUUGEL4SZ","components":"ENGINE","summary":"The engine seized and locked up leading to a catastrophic failure of my three month old 2025 GMC Sierra Denali at approximately 3,181 miles. The engine, the 6.2L V8, was listed as a recall engine by GM for model years 2021-2024. My 2025 allegedly \"passed inspection\" yet had the same catastrophic failure.  The vehicle engine made loud noises and it sounded like parts were breaking. The vehicle no longer starts and had to be taken via flatbed to the dealership where I was informed the engine had to be replaced.","products":[{"type":"Vehicle","productYear":"2025","productMake":"GMC","productModel":"SIERRA 1500","manufacturer":"General Motors, LLC"}]},{"odiNumber":11693164,"manufacturer":"General Motors, LLC","crash":false,"fire":false,"numberOfInjuries":0,"numberOfDeaths":0,"dateOfIncident":"08/01/2025","dateComplaintFiled":"10/13/2025","vin":"1GTUUCED7SZ","components":"POWER TRAIN","summary":"The vehicle has a vibration and stuttering feel during highway driving. Cruise between 70-75 has off and on again vibration is seat, steering wheel, and center console. The issue feels more pronounced between 60-65 and exhibits more of a hum, much like a washing machine drum that is out of balance. I have had the truck at 2 different dealerships and they have insisted it was a whee balance issue. I have also had the truck balanced at Costco. None of these issues have been alleviated with wheel balance. The dealership, where the truck was purchased, refused to test the truck at highway speeds and would only drive it for a short period at speeds up to 55mph. I have also reached out to GMC customer service, and they simply regurgitated what the dealer indicated about balance and testing at 55 mph or less in town. There seems to be a number of TSBs out on this issue. Most related to torque converter issues, but none of the dealers have indicated that my truck is impacted by any of the current TSBs, even though it exhibits all the symptoms. Not sure of the safety replications, but I am disappointed in the fact that the truck has had this issue since around 1,000 miles, and it seems like the dealer service departments are just ignoring it and refusing to do a thorough evaluation of the issue unless a code triggers or until a major failure occurs","products":[{"type":"Vehicle","productYear":"2025","productMake":"GMC","productModel":"SIERRA 1500","manufacturer":"General Motors, LLC"}]},{"odiNumber":11689336,"manufacturer":"General Motors, LLC","crash":false,"fire":false,"numberOfInjuries":0,"numberOfDeaths":0,"dateOfIncident":"09/23/2025","dateComplaintFiled":"09/24/2025","vin":"3GTUUEE88SG","components":"ENGINE","summary":"- On 9/23/2025 while driving down the main street, the vehicle unexpectedly shut down (engine stopped running) and would not restart.  The vehicle is currently at Elevation GMC (Boone ,NC) waiting to be diagnosed. - Safety was put at risk by the vehicle unexpectedly shutting down in the middle the of rush hour traffic and not being able to be moved. - When it is was towed into the dealership and explained to the service manager what happened; she said \"there is a known problem with the gear select lever losing communication with the truck and not knowing what gear it is in\". - As of 9/24/2025; dealership has not looked diagnosed what the problem is/was. - There were no prior warning messages before the engine shut down.","products":[{"type":"Vehicle","productYear":"2025","productMake":"GMC","productModel":"SIERRA 1500","manufacturer":"General Motors, LLC"}]},{"odiNumber":11688990,"manufacturer":"General Motors, LLC","crash":false,"fire":false,"numberOfInjuries":0,"numberOfDeaths":0,"dateOfIncident":"09/02/2025","dateComplaintFiled":"09/22/2025","vin":"3GTUUDEL5SG","components":"ELECTRICAL SYSTEM,STRUCTURE","summary":"--Radio power button inoperative  --Radio channel change buttons, to left of steering wheel inoperative (everyday) --Radio volume inoperative -just stops working (sometimes) --Radio \u201cHOME\u201d button, left of radio power button inoperative  --Driver door mirror wobbles when above 50 MPH (very distracting when driving)  --Driver door hard to close and out of alignment  --Dealership is selling the vehicles KNOWING some of the issues are present, but not advising the buyer.   My safety is/was at risk due to having to move my hands off the steering wheel to touch the radio display to make any changes while driving.  A certified GM service dept confirmed all my issues and could not repair.  They quoted a PIT 6408.  However,  this particular PIT does not address my issues/concerns.","products":[{"type":"Vehicle","productYear":"2025","productMake":"GMC","productModel":"SIERRA 1500","manufacturer":"General Motors, LLC"}]},{"odiNumber":11688037,"manufacturer":"General Motors, LLC","crash":false,"fire":false,"numberOfInjuries":0,"numberOfDeaths":0,"dateOfIncident":"09/12/2025","dateComplaintFiled":"09/18/2025","vin":"1GTUUGEL6SZ","components":"ELECTRICAL SYSTEM,SERVICE BRAKES,ENGINE","summary":"I purchased a 2025 GMC Denali a few months ago. At approximately 7,000 miles, the front brakes failed unexpectedly and were replaced by the dealership. However, by 14,000 miles, I began experiencing brake issues again. Before I could return the vehicle for service, I was driving on the turnpike when the engine suddenly seized without warning. This created an extremely dangerous situation\u2014vehicles behind me nearly collided as I lost power and control. I managed to pull over safely, but the tow truck operator struggled to load the vehicle due to all four wheels locking up and the engine being completely seized. Once the vehicle was inspected at the dealership, I was informed that the engine had failed and would need to be replaced. I am aware of the recurring issues associated with the 6.2L GMC engines and related component failures, and I no longer feel safe driving this vehicle. Given the repeated mechanical failures and the serious safety risks involved, I am formally requesting that GMC initiate a buyback of this vehicle. I believe this situation qualifies under lemon law protections and warranty obligations, and I urge GMC to take immediate action to resolve this matter.","products":[{"type":"Vehicle","productYear":"2025","productMake":"GMC","productModel":"SIERRA 1500","manufacturer":"General Motors, LLC"}]},{"odiNumber":11685741,"manufacturer":"General Motors, LLC","crash":false,"fire":false,"numberOfInjuries":0,"numberOfDeaths":0,"dateOfIncident":"09/02/2025","dateComplaintFiled":"09/08/2025","vin":"3GTUUDEL5SG","components":"ELECTRICAL SYSTEM","summary":"Power button (to turn on and off) to radios does not work,  the \"home\" button to the left of the radio power button does not work.","products":[{"type":"Vehicle","productYear":"2025","productMake":"GMC","productModel":"SIERRA 1500","manufacturer":"General Motors, LLC"}]},{"odiNumber":11684263,"manufacturer":"General Motors, LLC","crash":true,"fire":false,"numberOfInjuries":0,"numberOfDeaths":0,"dateOfIncident":"08/31/2025","dateComplaintFiled":"09/01/2025","vin":"3GTUUDED8SG","components":"ELECTRICAL SYSTEM,BACK OVER PREVENTION,FORWARD COLLISION AVOIDANCE","summary":"I drove into my driveway put vehicle in park put my window shades up and vehicle went into drive and hit my garage.i had no warnings and this was caught on my ring camera.the ring camera caught my headlights lite up on outside edge and lights kept blinking off an on like there was some kind of glitch.my.the vehicle did not brake either.i saved the video.   [XXX]   INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)","products":[{"type":"Vehicle","productYear":"2025","productMake":"GMC","productModel":"SIERRA 1500","manufacturer":"General Motors, LLC"}]},{"odiNumber":11684291,"manufacturer":"General Motors, LLC","crash":false,"fire":false,"numberOfInjuries":0,"numberOfDeaths":0,"dateOfIncident":"08/26/2025","dateComplaintFiled":"09/01/2025","vin":"3GTUUDEL8SG","components":"ELECTRICAL SYSTEM","summary":"The cameras will work after the vehicle sits for awhile like after it cools down. But once driving or letting the vehicle run awhile the cameras shut down. I think the Video Processor Module gets hot and shuts down. General Motors is looking into this issue","products":[{"type":"Vehicle","productYear":"2025","productMake":"GMC","productModel":"SIERRA 1500","manufacturer":"General Motors, LLC"}]},{"odiNumber":11683187,"manufacturer":"General Motors, LLC","crash":false,"fire":false,"numberOfInjuries":0,"numberOfDeaths":0,"dateOfIncident":"05/10/2025","dateComplaintFiled":"08/26/2025","vin":"1GTUUGE89SZ","components":"ELECTRICAL SYSTEM,LANE DEPARTURE,FORWARD COLLISION AVOIDANCE","summary":"On August 15th, 2025, I brought my new 2025 GMC Sierra 1500 Denali to Bill Cramer GM Dealership, 2251 W 23rd St, Panama City, FL 32405, due to a complete loss of audio in the cabin. This affected the turn signals, radio, and critical safety alerts, including collision warnings and seatbelt reminders. Given the vehicle's high cost and its status as a new premium model, this malfunction was both disappointing and alarming, particularly due to its implications for safety. This occurs about every third time I drive the vehicle.  The dealership retained my vehicle for over a week to diagnose and address the issue. I received an email stating that the service was complete and the truck was ready for pickup. However, upon arrival, a service technician informed me that they could not identify the cause of the audio failure and, consequently, no repairs were made. I was told the dealership would continue consulting with General Motors' corporate engineers to determine the cause and solution.","products":[{"type":"Vehicle","productYear":"2025","productMake":"GMC","productModel":"SIERRA 1500","manufacturer":"General Motors, LLC"}]},{"odiNumber":11682678,"manufacturer":"General Motors, LLC","crash":false,"fire":false,"numberOfInjuries":0,"numberOfDeaths":0,"dateOfIncident":"08/22/2025","dateComplaintFiled":"08/24/2025","vin":"1GTUUHEL1SZ","components":"UNKNOWN OR OTHER,ENGINE","summary":"I\u2019m filing this safety complaint in addition to a previous complaint,  11678151. which occurred on August 1, 2025.  On Friday, August 22, 2025, I experienced a 2nd Traction Control alert and engine failure lights on my 2026 Sierra Denali Ultimate truck which again caused the acceleration to drastically decline while driving home from work.  Thank God my kids were not in the car with me this time. \u00a0I am extremely appalled and confused as I've NEVER experienced this level of substandard operation from a new vehicle.  I have informed the leadership team team at Cavender GMC West San Antonio, TX of the situation.    The dealerships recommended (2) paths to exit the vehicle:  GMC Customer Assistance and dealership trade-in.","products":[{"type":"Vehicle","productYear":"2025","productMake":"GMC","productModel":"SIERRA 1500","manufacturer":"General Motors, LLC"}]},{"odiNumber":11681244,"manufacturer":"General Motors, LLC","crash":false,"fire":false,"numberOfInjuries":0,"numberOfDeaths":0,"dateOfIncident":"08/15/2025","dateComplaintFiled":"08/18/2025","vin":"3GTUUFELXSG","components":"ENGINE","summary":"The contact owns a 2025 GMC Sierra 1500. The contact stated that while driving at an undisclosed speed, the vehicle experienced a loss of automotive power. No warning light was illuminated. The vehicle was towed to a local independent mechanic, where it was diagnosed and determined that the engine had seized and needed to be replaced. The local dealer was contacted. The vehicle was not diagnosed or repaired. In addition, the contact related the failure to an unknown recall; however, the VIN was not under recall. The manufacturer was made aware of the failure. The failure mileage was approximately 75,000.","products":[{"type":"Vehicle","productYear":"2025","productMake":"GMC","productModel":"SIERRA 1500","manufacturer":"General Motors, LLC"}]},{"odiNumber":11679446,"manufacturer":"General Motors, LLC","crash":false,"fire":false,"numberOfInjuries":0,"numberOfDeaths":0,"dateOfIncident":"08/08/2025","dateComplaintFiled":"08/08/2025","vin":"1GTUUGEL2SZ","components":"UNKNOWN OR OTHER","summary":"Driving down interstate highway and sunroof \u201cexploded\u201d. Raising glass sunroof up about 2\u201d above the body. Vehicle had 387 miles on it. This occurred at about 6:55 am and outside temperature was about 74 degrees. The rupture was loud and very startling and I exited the interstate pulling over to see what occurred. There was no damage whatsoever to any other body component and no \u201cflying\u201d debris was observed at anytime that could have struck the vehicle. I requested GMC dealer to look at onboard cameras and save video but they seemed dismissive. Had the interior sunroof shade not been closed I would have been showered in glass while driving.","products":[{"type":"Vehicle","productYear":"2025","productMake":"GMC","productModel":"SIERRA 1500","manufacturer":"General Motors, LLC"}]},{"odiNumber":11678658,"manufacturer":"General Motors, LLC","crash":false,"fire":false,"numberOfInjuries":0,"numberOfDeaths":0,"dateOfIncident":"07/30/2025","dateComplaintFiled":"08/06/2025","vin":"3GTUUEEL1SG","components":"ELECTRICAL SYSTEM,VISIBILITY/WIPER,BACK OVER PREVENTION","summary":"The backup camera visibility at night is poor, making it very difficult to see behind the vehicle. This poses a potential safety hazard for pedestrians who may be in the path while reversing.","products":[{"type":"Vehicle","productYear":"2025","productMake":"GMC","productModel":"SIERRA 1500","manufacturer":"General Motors, LLC"}]},{"odiNumber":11678734,"manufacturer":"General Motors, LLC","crash":false,"fire":false,"numberOfInjuries":0,"numberOfDeaths":0,"dateOfIncident":"08/05/2025","dateComplaintFiled":"08/06/2025","vin":"3GTUUFEL2SG","components":"ENGINE AND ENGINE COOLING","summary":"The contact owns a 2025 GMC Sierra 1500. The contact stated that while at a stop light waiting to make a left turn, the vehicle stalled. The vehicle failed to restart. No warning lights were illuminated prior to the failure. The contact stated that the failure was related to NHTSA Campaign Number 25V274000 (Engine and Engine Cooling). The vehicle was towed to the local dealer to be diagnosed, and the contact was informed that the engine had seized. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 21,100.","products":[{"type":"Vehicle","productYear":"2025","productMake":"GMC","productModel":"SIERRA 1500","manufacturer":"General Motors, LLC"}]},{"odiNumber":11678617,"manufacturer":"General Motors, LLC","crash":false,"fire":false,"numberOfInjuries":0,"numberOfDeaths":0,"dateOfIncident":"08/01/2025","dateComplaintFiled":"08/05/2025","vin":"3GTUUEE88SG","components":"UNKNOWN OR OTHER","summary":"The drivers side grab handle (a pillar trim piece) is cracked through completely at upper bolt mount location, causing the grab handle to be weakened and unable to safely support while using and could pull away from vehicle while in use potentially causing the driver to fall and become injured.    I replaced the original with a genuine OEM replacement from the dealership and it cracked in the exact same place.   I posted an inquiry to a Facebook group of fellow GMC owners and there were numerous reports of this having to them and having the dealership replace under warranty, only to have the issue occur again.   This structural failure seems to happen with or without use of the grab bar.","products":[{"type":"Vehicle","productYear":"2025","productMake":"GMC","productModel":"SIERRA 1500","manufacturer":"General Motors, LLC"}]},{"odiNumber":11678151,"manufacturer":"General Motors, LLC","crash":false,"fire":false,"numberOfInjuries":0,"numberOfDeaths":0,"dateOfIncident":"08/01/2025","dateComplaintFiled":"08/04/2025","vin":"1GTUUHEL1SZ","components":"POWER TRAIN,VEHICLE SPEED CONTROL,UNKNOWN OR OTHER","summary":"I am writing to express my extreme disappointment and serious concern regarding a critical safety failure I experienced with my 2025 GMC Sierra 1500 Denali Unlimited (VIN: [XXX] ), which I purchased brand new in April 2025 from Cavender GMC, San Antonio, TX. On Friday, [XXX], with fewer than 9,000 miles on the vehicle, I was driving on the highway at about 65 MPH, with my minor son in the vehicle when the dash suddenly displayed a Traction Control (TRC) Fault message, followed immediately by \"Acceleration is Limited.\" The truck experienced a severe and unexpected power loss, severely restricting my ability to accelerate or maintain safe highway speeds. I was forced to pull off the road abruptly to avoid a potentially dangerous situation. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)","products":[{"type":"Vehicle","productYear":"2025","productMake":"GMC","productModel":"SIERRA 1500","manufacturer":"General Motors, LLC"}]},{"odiNumber":11676005,"manufacturer":"General Motors, LLC","crash":false,"fire":false,"numberOfInjuries":0,"numberOfDeaths":0,"dateOfIncident":"07/13/2025","dateComplaintFiled":"07/24/2025","vin":"1GTUUCED6SZ","components":"POWER TRAIN,ELECTRICAL SYSTEM,FUEL/PROPULSION SYSTEM","summary":"This is the second time in 2 days!! While driving ~35MPH the truck experienced a harsh transmission shift followed by a sudden loss of acceleration and entered shutdown mode to protect the engine. The steering became stiff, all dashboard warning lights illuminated, and a message appeared on the driver display indicating a transmission issue and advising to drive with caution. This created an extremely hazardous condition for me while driving on s busy stretch of road. I pulled onto the side of the road, came to a complete stop, shifted into park, and turned off the engine. Upon restarting the vehicle, the Check Engine Light remained on, and the transmission continued to shift abnormally at low speeds, including some noticeable shuddering. My GMC application recorded the issue and reminded me to schedule service.","products":[{"type":"Vehicle","productYear":"2025","productMake":"GMC","productModel":"SIERRA 1500","manufacturer":"General Motors, LLC"}]},{"odiNumber":11676015,"manufacturer":"General Motors, LLC","crash":false,"fire":false,"numberOfInjuries":0,"numberOfDeaths":0,"dateOfIncident":"06/22/2025","dateComplaintFiled":"07/24/2025","vin":"1GTUUCED6SZ","components":"SERVICE BRAKES,ENGINE,FUEL/PROPULSION SYSTEM","summary":"While in the parking lot of a local grocery store, I shifted the vehicle into reverse, at which point all dashboard warning lights immediately illuminated and the braking response became significantly weakened and nearly unresponsive. I placed the vehicle back into park, paused, and then attempted to shift into reverse again, but the dashboard alerts and brake issue persisted. This created a very unsafe driving situation because the brake system was very unresponsive. Despite the unsafe condition, I cautiously drove to my home 2miles away at a speed of under 20 MPH, requiring excessive brake pressure to bring the vehicle to a stop. I parked the vehicle in my driveway and left it there overnight. The next morning, I tested the brakes, and they seemed to return to normal so I drove 5 miles to my local GMC service center. Service Tech confirmed Check Engine Light On and reported code P0700 and P00FF in the report.","products":[{"type":"Vehicle","productYear":"2025","productMake":"GMC","productModel":"SIERRA 1500","manufacturer":"General Motors, LLC"}]},{"odiNumber":11674120,"manufacturer":"General Motors, LLC","crash":false,"fire":false,"numberOfInjuries":0,"numberOfDeaths":0,"dateOfIncident":"07/14/2025","dateComplaintFiled":"07/16/2025","vin":"1GTUUCED6SZ","components":"POWER TRAIN,ELECTRICAL SYSTEM,FUEL/PROPULSION SYSTEM","summary":"While driving on the highway at 70 MPH, the truck experienced a harsh transmission shift followed by a sudden loss of acceleration and entered shutdown mode to protect the engine. The steering became stiff, all dashboard warning lights illuminated, and a message appeared on the driver display indicating a transmission issue and advising to drive with caution. The RPMs surged and the truck struggled to maintain a speed of 45 MPH while the remaining at 4000 RPM. This created an extremely hazardous situation for both me and my passenger. I safely pulled into the breakdown lane, came to a complete stop, shifted into park, and turned off the engine. Upon restarting the vehicle, the Check Engine Light remained on, and the transmission continued to shift abnormally at low speeds, including noticeable shuddering.","products":[{"type":"Vehicle","productYear":"2025","productMake":"GMC","productModel":"SIERRA 1500","manufacturer":"General Motors, LLC"}]},{"odiNumber":11670408,"manufacturer":"General Motors, LLC","crash":false,"fire":false,"numberOfInjuries":0,"numberOfDeaths":0,"dateOfIncident":"05/24/2025","dateComplaintFiled":"06/30/2025","vin":"3GTUUEEL1SG","components":"STRUCTURE,UNKNOWN OR OTHER","summary":"Tailgate switch Tailgate opened on its own with trailer attached while driving damaging the top of my tailgate. No notification inside cab. No console / fob / tailgate buttons were pushed.  Discovered tailgate was down after I arrived home and had done a wide u-turn in my back yard. So far dealership has done very little diagnostic wise. Two trips to dealership so far with little to no results.  Now I\u2019m scared to use my trailer or utilize the bed of the truck to haul anything due to tailgate might open on its own at 75 mph on a major interstate/ 2 lane road hurting or killing the people in the vehicles behind me. Totally unacceptable from GMC / dealer for a 70k truck.","products":[{"type":"Vehicle","productYear":"2025","productMake":"GMC","productModel":"SIERRA 1500","manufacturer":"General Motors, LLC"}]},{"odiNumber":11669746,"manufacturer":"General Motors, LLC","crash":true,"fire":false,"numberOfInjuries":0,"numberOfDeaths":0,"dateOfIncident":"06/10/2025","dateComplaintFiled":"06/27/2025","vin":"3GTUUDED2SG","components":"POWER TRAIN","summary":"Truck was in \"Park\" idling for 20 minutes when it went from Park to \"Reverse\" on its own. A person sitting in a dump truck saw the backup lights on my truck come on and the truck started backing towards his truck. My truck hit his truck causing damage to my left rear bumper.","products":[{"type":"Vehicle","productYear":"2025","productMake":"GMC","productModel":"SIERRA 1500","manufacturer":"General Motors, LLC"}]},{"odiNumber":11666790,"manufacturer":"General Motors, LLC","crash":false,"fire":false,"numberOfInjuries":0,"numberOfDeaths":0,"dateOfIncident":"01/24/2025","dateComplaintFiled":"06/13/2025","vin":"3GTUUDE88SG","components":"POWER TRAIN,VEHICLE SPEED CONTROL,ENGINE","summary":"The contact owns a 2025 GMC Sierra 1500. The contact stated while driving approximately 4 MPH and turning left into a parking spot, the vehicle independently accelerated. The contact stated that the brake pedal was depressed. The contact stated there was no warning light illuminated. The contact stated that the failure was intermittent, but the failure occurred while slowing down under 5 MPH and turning to the left. The contact had taken the vehicle to a local dealer; however, the failure was not duplicated. The vehicle was not repaired. The manufacturer was informed of the failure. The failure mileage was approximately 17,000.","products":[{"type":"Vehicle","productYear":"2025","productMake":"GMC","productModel":"SIERRA 1500","manufacturer":"General Motors, LLC"}]},{"odiNumber":11664839,"manufacturer":"General Motors, LLC","crash":false,"fire":false,"numberOfInjuries":0,"numberOfDeaths":0,"dateOfIncident":"04/27/2025","dateComplaintFiled":"06/04/2025","vin":"1GTUUEE84SZ","components":"ENGINE,FUEL/PROPULSION SYSTEM","summary":"The vehicle was purchased for the express purpose of towing a 6,600 lbs Travel Trailer.  This truck is equipt with the 3 liter Diesel engine.  While towing the truck computer counts down milage available based on Def level.  The count down is not mile for mile it is an exponential count down.  This factor triggers a series of warnings concerning vehicle operation and impending speed restrictions.  1000 mile DEF range warning is first up.  Followed shortly there after with a 300 mile DEF range warning (700 miles had never been reached to trigger the warning).  The next warning is \"DEF Low (red warning) speed restricted soon\".  Shortly there after a 500 mile count down starts for the first impending speed reduction to 65 MPH max.  This is followed by other speed restrictions that will put the vehicle eventually into a 5 MPH speed restricted mode.  When adding DEF to the tank the level has never been below 60% full.  Its not empty as the gauge and computer indicate.  With each filling of the DEF tank the range you can drive is less and less until the truck is driven without the trailer hooked up.  GM has a service bulletin for this situation that has been in place since September 23, 2024 and no permanent repair of solution has been prescribed.  During the 500 mile count down to the first speed restriction the instrument cluster is locked out to only display \"DEF Empty\" and alternately the DEF range counting down.  No other safety features are visible such as engine temp or transmission temp important to know while towing.  I Purchased this vehicle March 17, 2025 stating my intentions to tow a travel trailer.  The dealership no GMC ever made me aware of the Service bulletin of the DEF restrictions.  Had they done so I would have purchased a different vehicle with out the associated travel issues.  Please reference GM Service Bulletin #24-NA-196 Document ID 6736285.  This document was given to me after my 4 visit to a GMC dealership to have the issue addressed.","products":[{"type":"Vehicle","productYear":"2025","productMake":"GMC","productModel":"SIERRA 1500","manufacturer":"General Motors, LLC"}]},{"odiNumber":11664238,"manufacturer":"General Motors, LLC","crash":false,"fire":false,"numberOfInjuries":0,"numberOfDeaths":0,"dateOfIncident":"06/01/2025","dateComplaintFiled":"06/01/2025","vin":"1GTUUEEL5SZ","components":"VISIBILITY/WIPER","summary":"The backup camera on the new 2025 GMC Sierra 1500 AT4 is not displaying a visible picture at night.  During the day time, the picture is clear.  At night, you cannot see nearly anything.  This is and has been widely reported online.  This poses a massive safety threat to pedestrians, pets, other vehicles, and property; due to the night vision malfunction.  Please make this a RECALL on GMC to prevent any catastrophic occurrences.  This is unacceptable for any 2025 vehicle and the law requires all new vehicles must have backup cameras.  It must be a requirement that the cameras function in BOTH day and NIGHT.","products":[{"type":"Vehicle","productYear":"2025","productMake":"GMC","productModel":"SIERRA 1500","manufacturer":"General Motors, LLC"}]},{"odiNumber":11663238,"manufacturer":"General Motors, LLC","crash":false,"fire":false,"numberOfInjuries":0,"numberOfDeaths":0,"dateOfIncident":"05/22/2025","dateComplaintFiled":"05/27/2025","vin":"1GTUUHEL9SZ","components":"BACK OVER PREVENTION","summary":"The contact owns a 2025 GMC Sierra 1500. The contact stated that while shifted into reverse(R) at night, the rear-view camera image was very dark, creating a hazard while reversing. The contact stated that during daylight, the image was perfect; however, at night the reverse lights failed to provide adequate illumination, causing objects on the display screen to be very dark. The contact had taken the vehicle to a local dealer to be diagnosed and was informed that there was no failure of the back over prevention system, rear camera, reverse lights, or display screen. The vehicle was not repaired. The manufacturer was not informed of the failure. The failure mileage was 2,682.","products":[{"type":"Vehicle","productYear":"2025","productMake":"GMC","productModel":"SIERRA 1500","manufacturer":"General Motors, LLC"}]},{"odiNumber":11658783,"manufacturer":"General Motors, LLC","crash":false,"fire":false,"numberOfInjuries":0,"numberOfDeaths":0,"dateOfIncident":"05/04/2025","dateComplaintFiled":"05/04/2025","vin":"3GTUUGELXSG","components":"ENGINE,FUEL/PROPULSION SYSTEM","summary":"I WAS DRIVING ON A PA ROAD AT ABOUT 30 MPH.  MY CAR STOPPED IMMEDIATELY AND I HEARD THE MOTOR REV.  THE CAR THEN SLAMMED INTO A STOP.","products":[{"type":"Vehicle","productYear":"2025","productMake":"GMC","productModel":"SIERRA 1500","manufacturer":"General Motors, LLC"}]},{"odiNumber":11656822,"manufacturer":"General Motors, LLC","crash":true,"fire":false,"numberOfInjuries":0,"numberOfDeaths":0,"dateOfIncident":"03/15/2025","dateComplaintFiled":"04/25/2025","vin":"1GTPUCEK0SZ","components":"ELECTRICAL SYSTEM,STRUCTURE,UNKNOWN OR OTHER","summary":"2025 GMC Sierra 1500 shifted from Park to Drive uncommanded, accelerated uphill, and crashed while idling, keyfob outside of vehicle, March 2025. ESIS couldn't replicate and falsely claimed I didn't put it in Drive, despite photos and no one inside.","products":[{"type":"Vehicle","productYear":"2025","productMake":"GMC","productModel":"SIERRA 1500","manufacturer":"General Motors, LLC"}]},{"odiNumber":11649886,"manufacturer":"General Motors, LLC","crash":false,"fire":false,"numberOfInjuries":0,"numberOfDeaths":0,"dateOfIncident":"03/01/2025","dateComplaintFiled":"03/22/2025","vin":"3GTUUEE80SG","components":"ENGINE","summary":"Purchased the vehicle 300 miles away. Flew out, picked up the truck and drove it home. Got back Saturday night. Woke up Sunday morning to review the features, etc. Noticed a major oil leak. Called the dealership I purchased it from. They told me to take it to a (local) dealership. I took it to my local dealership. They looked at the vehicle. Initially they thought it was a faulty valve cover gasket. They ordered the parts. When they actually started taking the vehicle apart, the issue was not the valve gasket but the crack in the valve cover itself. They replaced the valve cover. It went to the dealer on date 03/03/2025 and they gave he vehicle back to me on 03/21/2025. They said this crack had to of happened on the production line but before it got delivered to the initial dealership.","products":[{"type":"Vehicle","productYear":"2025","productMake":"GMC","productModel":"SIERRA 1500","manufacturer":"General Motors, LLC"}]},{"odiNumber":11640628,"manufacturer":"General Motors, LLC","crash":false,"fire":false,"numberOfInjuries":0,"numberOfDeaths":0,"dateOfIncident":"11/01/2024","dateComplaintFiled":"02/04/2025","vin":"3GTU2WEJ8FG","components":"POWER TRAIN","summary":"Transmission is shifting rough","products":[{"type":"Vehicle","productYear":"2025","productMake":"GMC","productModel":"SIERRA 1500","manufacturer":"General Motors, LLC"}]},{"odiNumber":11636913,"manufacturer":"General Motors, LLC","crash":false,"fire":false,"numberOfInjuries":0,"numberOfDeaths":0,"dateOfIncident":"12/27/2024","dateComplaintFiled":"01/19/2025","vin":"1GTUUHE85SZ","components":"SUSPENSION","summary":"I purchased a 2025 GMC Siera Denali Ultimate in December 2024. Approximately 2 weeks after purchasing the vehicle, I was driving down the road I received a message that said, \"Service Suspension\". I was able to call OnStar for diagnostic and the truck was throwing code C2A0A. I took the truck into the dealership to see what the issue was. The dealership said that I apparently ran something over and it must have flown up and broke a plastic sensor cover on the lower rear left shock. I never hit anything but have no way to prove. So, I had to pay $526 for a new shock.  Even if I did run over something if that area of the shock is that sensitive it should be better protected especially if it's not covered under warranty.","products":[{"type":"Vehicle","productYear":"2025","productMake":"GMC","productModel":"SIERRA 1500","manufacturer":"General Motors, LLC"}]},{"odiNumber":11635955,"manufacturer":"General Motors, LLC","crash":false,"fire":false,"numberOfInjuries":0,"numberOfDeaths":0,"dateOfIncident":"01/14/2025","dateComplaintFiled":"01/14/2025","vin":"3GTUUCE87SG","components":"STEERING,POWER TRAIN,ENGINE","summary":"While on the freeway at 65mph the truck experience a hard gear shift, loss of acceleration, went into shut down, lost steering assist, and brakes became hard, lights came on the dash for transmission issue massage, as well as Check engine light. Safety became a major concern with loss of power in the mids of a flow off traffic at freeway speeds. Vehicle had to be towed.","products":[{"type":"Vehicle","productYear":"2025","productMake":"GMC","productModel":"SIERRA 1500","manufacturer":"General Motors, LLC"}]},{"odiNumber":11634151,"manufacturer":"General Motors, LLC","crash":false,"fire":false,"numberOfInjuries":0,"numberOfDeaths":0,"dateOfIncident":"01/01/2025","dateComplaintFiled":"01/05/2025","vin":"1GTPHDED6SZ","components":"EXTERIOR LIGHTING,BACK OVER PREVENTION","summary":"Just purchased a new 2025 GMC Sierra. The backup camera system is useless at night if not in a well lit parking lot. This make the system unsafe as you cannot detect people or objects in the field of view. I've had many GMC vehicles over the years and this is the first one with this concern.","products":[{"type":"Vehicle","productYear":"2025","productMake":"GMC","productModel":"SIERRA 1500","manufacturer":"General Motors, LLC"}]}]}