{"count":1,"message":"Results returned successfully","results":[{"odiNumber":11736307,"manufacturer":"General Motors, LLC","crash":false,"fire":false,"numberOfInjuries":0,"numberOfDeaths":0,"dateOfIncident":"12/31/2025","dateComplaintFiled":"05/07/2026","vin":"1GTU9FEL4KZ","components":"ENGINE","summary":"I own a 2019 GMC Sierra 1500 Denali equipped with the 6.2L L87 engine. On or around December 31, 2025, the vehicle developed a loud knocking noise from the engine that became worse with RPM increase. The truck was taken to a GMC dealership for diagnosis and repair under warranty/service contract coverage.  The dealership initially diagnosed valvetrain-related failure and replaced multiple top-end components including lifters, rocker arms, camshaft-related parts, belts, pulleys, hoses, and associated hardware. After reassembly, the engine reportedly started briefly and then failed again. The dealership then performed additional teardown and determined the lower end of the engine had also failed. I was informed by dealership staff that rod bearing failure is \u201cvery common\u201d on the L87 6.2L engines.  Due to the extent of the damage, the vehicle ultimately required a complete long block replacement. My truck remained out of service from approximately 12/31/2025 until 5/1/2026, a period of roughly four months. During that time, there were repeated delays involving diagnosis, inspections, warranty approvals, and additional teardown procedures.  The vehicle had approximately 111,858 miles at the time of failure and had been regularly maintained. Prior to the engine failure, the truck exhibited abnormal engine ticking/knocking noises under load and higher RPM operation. The final repair performed was replacement of the engine long block assembly.  I am submitting this report because the dealership indicated this type of lower-end/rod bearing failure is common on the GM 6.2L L87 platform, and I believe this issue may represent a broader reliability and safety concern affecting other owners.","products":[{"type":"Vehicle","productYear":"2019","productMake":"GMC","productModel":"SIERRA 1500","manufacturer":"General Motors, LLC"}]}]}