The U.S. National Highway Traffic Safety Administration (NHTSA) announced on Friday that it has opened an investigation into approximately 997,743 General Motors (GM) pickup trucks and SUVs. The probe focuses on reports of engine failure in vehicles that had previously been subject to a recall intended to fix the issue.
The federal safety regulator stated that it has received 499 complaints alleging that engines failed even after the vehicles had undergone the manufacturer's recommended repair. Last year, GM issued a recall for these models to address engine failure concerns, which the Detroit-based automaker attributed to a component from a supplier.
The new investigation, described by the NHTSA as an engineering analysis, will examine these post-recall failures to determine if GM’s previous remedy was effective. The vehicles under review are from model years 2021 through 2026 and are equipped with GM's L87 engines. Impacted models include the Cadillac Escalade, Chevrolet Silverado 1500, and GMC Yukon.
Drivers of these specific trucks and SUVs may notice engine performance issues or total mechanical failure, even if their vehicle was already serviced under the previous recall. The NHTSA is currently analyzing 499 reported instances where the original fix failed to prevent the engine from breaking down. A confirmed failure of the previous remedy could lead to a second round of required service appointments, potentially affecting the resale value and reliability of these vehicles.
The investigation creates a formal regulatory record of the effectiveness of GM’s L87 engine components and its supplier's parts. If the NHTSA determines the previous fix was insufficient, it could set a precedent for how the agency handles "recall completion" data and future enforcement actions against automakers for ineffective remedies. As of Friday, the NHTSA has not announced a deadline for completing the engineering analysis or a date for a potential secondary recall. Owners of the affected 2021-2026 models will continue to operate their vehicles while the federal probe into the effectiveness of the Detroit automaker's previous fix remains open.