NHTSA Expands Probe into GM 6.2L V8 Following Surge of Engine Bearing Complaints
The National Highway Traffic Safety Administration (NHTSA) has ramped up its investigation into General Motors vehicles equipped with the L87 6.2-liter V8. What began as a preliminary review has now escalated into a full engineering analysis after more than 1,100 reports of engine bearing failures. The expanded investigation covers roughly 286,000 trucks and SUVs in the U.S., including popular models like the Chevrolet Silverado 1500 and Cadillac Escalade, and it extends to vehicles previously outside GM’s recall scope. Regulators aim to determine whether the issue is isolated or indicative of a broader manufacturing problem.
The saga started in January, when NHTSA opened its initial probe into engine failures tied to bearing damage in the L87. In April, GM launched a recall targeting connecting rod and crankshaft defects that could lead to engine damage or sudden loss of propulsion. Despite the recall, complaints continued to pour in, prompting the agency to advance to the engineering analysis stage. At this point, investigators dive deeper into the root causes, examine repair effectiveness, and assess whether additional vehicles need coverage.
The L87 is GM’s top-tier gas V8, favored for its towing capacity, broad torque curve, and smooth highway performance. Bearing failure, however, can result in expensive repairs—or in worst-case scenarios, abrupt engine shutdowns. So far, NHTSA reports no injuries or fatalities linked to the issue, but the potential for a sudden stall at highway speeds is a serious safety concern.
Notably, many of the reports fall outside GM’s initial recall. This raises questions about whether the failures stem from a single supplier batch or a more systemic quality issue across multiple plants and production years. The ongoing engineering analysis will explore these possibilities and determine if the recall population should expand, repairs need refinement, or further action is required.
Owners are already spotting early warning signs of bearing distress: low oil pressure alerts, ticking or knocking noises on cold starts, metallic debris in the engine, and sudden power loss. If your vehicle has the L87 6.2-liter V8 and exhibits any of these symptoms, document everything and schedule a professional inspection immediately. Maintaining detailed service records, checking your VIN against NHTSA’s recall database, and submitting complaints to the agency can all help shape the investigation.
For GM, the stakes are significant. The 6.2L V8 powers some of the company’s highest-margin vehicles—from Silverado and Sierra 1500 trucks to the long-wheelbase Cadillac Escalade ESV. These models are synonymous with durability and capability, and customers expect trouble-free operation from a flagship V8. Transparent communication and a thorough remedy are essential to maintaining brand trust.
During an engineering analysis, NHTSA can request additional data from GM, inspect returned vehicles, and evaluate whether prior remedies are effective. The investigation could ultimately result in no further action, an expanded recall, or a new service campaign. While there is no set timeline, the move to a full engineering review signals that regulators see enough evidence to warrant deeper scrutiny.
If you own a 2019–2024 GM truck or SUV with the L87, it’s critical to stay informed. Check for open recalls, monitor for unusual engine noises, and never ignore warning lights. For vehicles that have already been repaired, confirm the replaced components and timing. Even if your engine appears problem-free, maintaining proper oil quality and adhering to service schedules are the best defenses while the investigation continues.
Malcolm Hogan, founder and editor of Automotive Addicts, has spent over two decades covering the automotive industry. Known for honest reviews, sharp insights, and comprehensive coverage—from high-performance test drives to new vehicle launches—Hogan continues to provide enthusiasts and industry insiders with trusted guidance on everything car-related.