{"count":1,"message":"Results returned successfully","results":[{"odiNumber":11735127,"manufacturer":"General Motors, LLC","crash":false,"fire":false,"numberOfInjuries":0,"numberOfDeaths":0,"dateOfIncident":"09/01/2025","dateComplaintFiled":"05/01/2026","vin":"3GNKBERS1MS","components":"UNKNOWN OR OTHER,FUEL/PROPULSION SYSTEM","summary":"I am reaching out regarding an ongoing issue with my 2021 Chevrolet Blazer. The vehicle is experiencing a noticeable stutter or hesitation when shifting between second and third gear.  In addition, there are instances where the vehicle accelerates unexpectedly or more aggressively than intended. This behavior is particularly concerning, as it presents a potential safety issue during normal driving conditions.  These concerns have become increasingly noticeable, and I am concerned they may indicate a transmission or related mechanical problem that requires prompt inspection and resolution.  Please advise if there are any known service bulletins, recalls, or warranty coverage related to these issues.  For reference, the vehicle has been properly maintained and this behavior is not consistent with normal operation. Given that this is now the third major issue I\u2019ve experienced with this vehicle, I am hoping this matter can be addressed without additional out-of-pocket expense.  After additional research, I have learned that other owners have experienced the same issue.  Others have stated the following:  1.  Hesitation, stuttering, or jerking between gears Owners of 2020\u20132021 Blazers report hesitation and jerking during acceleration, sometimes described as gears \u201cshifting in and out rapidly.\u201d   Forum users mention sluggish shifting or slipping feelings, especially at certain speeds.   Others report hard or delayed shifts at low speeds (like 15\u201325 mph).   2.  Shuddering / vibration (often tied to torque converter) There are repeated mentions of \u201cshudder,\u201d \u201csurge,\u201d or vibration during acceleration.   Some cases were linked to: Contaminated transmission fluid Torque converter clutch (TCC) issues One owner said the problem felt like a bad torque converter and required service attention.   3.  Unexpected acceleration / lunging Drivers across GM vehicles (including similar transmissions) report: \u201cJerking,\u201d \u201cbucking,\u201d or \u201clunging\u201d during acceleration   Some describe needing to","products":[{"type":"Vehicle","productYear":"2021","productMake":"CHEVROLET","productModel":"BLAZER","manufacturer":"General Motors, LLC"}]}]}