NHTSA Investigates GM’s Recall Fix for 6.2L V8 Engine Issues

The U.S. National Highway Traffic Safety Administration (NHTSA) is investigating whether General Motors’ (GM) remedy for its recalled 6.2L V8 engines is sufficient. The recall, which affected approximately 49,848 units in Canada, was initiated due to concerns over potential catastrophic engine failures related to the L87 engines used in specific GM trucks and full-size SUVs.

Last year, GM recalled models equipped with these engines, citing issues with the manufacturing of “connecting rods and/or crankshaft components.” In response, the company introduced a fix that involved changing the engine oil to a higher-viscosity variant, replacing the oil filter, and swapping the filler cap. This solution has raised eyebrows among both vehicle owners and federal investigators, particularly regarding its effectiveness in addressing the serious concerns outlined in the recall.

NHTSA officials are critically assessing the “adequacy of remedy” provided by GM, questioning whether a simple oil viscosity change can genuinely resolve the underlying mechanical issues. While GM estimated that only about 3% of the 597,630 trucks affected by the recall in the United States would experience problems, the NHTSA has received nearly 30,000 complaints from concerned consumers, leading to suspicions that GM might be downplaying the severity of the situation.

Social media is rife with reports from frustrated owners and GM mechanics, many of whom have documented engine failures shortly after vehicle delivery. Some mechanics have reported performing engine replacements on vehicles with less than 1,000 kilometers on the odometer, highlighting the extent of the issue.

In a related note, Transport Canada issued a safety notice in April 2025, expanding the recall campaign to include a wide range of GM trucks and SUVs from the 2021 to 2024 model years. This recall encompasses popular models like the Chevrolet Silverado 1500, GMC Sierra 1500, Chevrolet Tahoe, and Cadillac Escalade, among others.

The ongoing scrutiny by the NHTSA serves as a reminder of the complexities involved in automotive recalls and the importance of effective remedial action. As investigations continue, both consumers and GM will be keenly awaiting the outcome, which could have significant implications for the automaker’s reputation and future sales.