NHTSA Probes Nearly 1 Million GM L87 V-8 Vehicles Over Post-Repair Engine Failures

TL;DR Summary
The NHTSA has opened an engineering analysis into up to 997,743 GM vehicles powered by the 6.2L L87 V-8 after 499 reports of post-remedy engine failures following Recall 25V-274, spanning 2021–2026 models such as the Silverado, Suburban, Tahoe, Escalade, Sierra and Yukon. ODI expanded the investigation to engines built from March 1, 2021 to May 31, 2024 and GM’s oil-viscosity change or engine replacement remedies appear not to have fully resolved the issue, signaling a broader safety probe that could influence GM’s future use of the L87 engine in its top-selling trucks and SUVs.
- NHTSA Expands Probe Into 997,000 GM V-8 Trucks and SUVs After Reported Post-Recall Engine Failures Road & Track
- NHTSA Opens Investigation Into GM V-8s That Won’t Stop Imploding, Despite Receiving Recall Remedy Car and Driver
- GM Faces Safety Probe Over Engine-Failure Concerns in Nearly One Million Vehicles WSJ
- NHTSA expands GM engine recall probe to include more model years Detroit Free Press
- US highway agency expands probe into GM pickups, SUVs over engine failures Reuters
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