NHTSA Investigates GM’s Solution for Recalled 6.2L V8 Engines

The U.S. National Highway Traffic Safety Administration (NHTSA) has launched an investigation into whether General Motors’ (GM) recent repair for its recalled 6.2L V8 engines is sufficient. This inquiry comes after concerns were raised about the adequacy of the fix, which involved changing the engine oil to a higher-viscosity type, along with replacing the oil filter and filler cap.

The recall, which affected approximately 49,848 units in Canada, was initiated last year due to potential issues related to the engine’s connecting rods and crankshaft components. Owners of certain GM trucks and full-size SUVs equipped with the 6.2L V8 engine began reporting problems that could lead to catastrophic engine failure. Following the recall, GM proposed a solution that has left many vehicle owners questioning whether simply changing the oil could adequately address such serious concerns.

NHTSA officials are now scrutinizing the “adequacy of remedy” provided by GM, especially considering the potential severity of the issues outlined in the recall. The agency originally estimated that only around 3% of the 597,630 trucks affected in the United States would experience problems. However, nearly 30,000 complaints have been filed, prompting federal investigators to reconsider the company’s assessment of the situation.

Customer feedback has not been positive. Many owners have taken to social media to share their frustrations, documenting instances of engine failures even on vehicles with minimal mileage. Reports from GM dealerships indicate that mechanics have encountered engines requiring significant repairs shortly after delivery.

In a recent conversation on a flight from Detroit, a long-time GM employee expressed his dissatisfaction with the situation, highlighting the ongoing issues not only with the 6.2L V8 engine but also with the eight-speed automatic transmission used in some models. Such sentiments reflect a broader discontent among consumers who feel that GM’s solutions may not fully resolve the problems at hand.

In April 2025, Transport Canada issued its own notice about the recall, encompassing a range of GM trucks and SUVs from the 2021 to 2024 model years. Models affected include the popular Chevrolet Silverado 1500, GMC Sierra 1500, Chevrolet Tahoe, and Cadillac Escalade, among others.

As investigations continue, both GM and the NHTSA face mounting pressure to ensure that the safety of consumers remains the top priority. The outcome of this inquiry will likely have significant implications for the automaker, as well as for vehicle owners worried about the reliability of their engines.

This unfolding situation exemplifies the challenges that automakers face in addressing safety concerns and highlights the importance of transparent communication with customers. As more information becomes available, both the NHTSA and GM will need to respond effectively to restore public confidence in their vehicles.