The U.S. National Highway Traffic Safety Administration (NHTSA) has opened an engineering analysis into engine failures reported in nearly 1 million General Motors vehicles, including the Cadillac Escalade, Chevrolet Silverado 1500 and GMC Yukon.
The investigation covers model years 2021 through 2026 equipped with GM’s L87 engines, following 499 complaints alleging engine failures in vehicles that had already undergone a prior recall remedy. The NHTSA said the engineering analysis will assess the effectiveness of GM’s previous fixes and examine the root cause of post-recall failures.
GM issued a recall last year to address engine failure concerns in the L87 unit, attributing the issue to a supplier. The NHTSA’s probe, opened on Friday, focuses on whether the recall adequately resolved the problem or if additional corrective action is required. The agency did not specify a timeline for completion of the engineering analysis.
The affected models include the Cadillac Escalade, Chevrolet Silverado 1500 and GMC Yukon, all powered by the L87 engine. The investigation covers 997,743 vehicles in total.
