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History Behind the Investigation
The National Highway Traffic Safety Administration (NHTSA) has opened a new engineering analysis into certain General Motors SUVs and trucks over reports of engine failures that may extend beyond GM’s previous recall.
The issue, described by regulators as “loss of motive power due to engine failure,” centers on vehicles equipped with 6.2-liter V8 gasoline engines. According to NHTSA’s Office of Defects Investigation (ODI), the failures may result from manufacturing defects in the connecting rod and crankshaft, which can cause sudden engine seizure and stalling while driving, posing a serious crash risk.
GM previously issued a recall in April 2025, covering approximately 721,000 vehicles from the 2021–2024 model years, including Cadillac Escalade, Chevrolet Silverado 1500, Suburban, Tahoe, and GMC Sierra 1500, Yukon, and Yukon XL models.
However, NHTSA has since received more than 1,100 additional complaints of engine failures from owners whose vehicles were not included in GM’s recall, prompting this new round of scrutiny.
Vehicles Under Investigation
The current investigation covers roughly 286,000 vehicles that were part of the original inquiry but excluded from GM’s voluntary recall.
According to NHTSA’s October 23 report, the vehicles under investigation include:
- 2019–2024 Chevrolet Silverado 1500
- 2019–2024 GMC Sierra 1500
- 2021–2024 Chevrolet Suburban
- 2021–2024 Chevrolet Tahoe
- 2021–2024 GMC Yukon / Yukon XL
- 2021–2024 Cadillac Escalade / Escalade ESV
The ODI report notes that 173 of the 1,157 engine failure complaints involve vehicles outside GM’s original recall (identified internally as 25V-274). The agency said this trend represents a potential safety risk that “warrants further investigation.”
GM has acknowledged the issue stems from supplier quality problems and says it is cooperating fully with regulators. The automaker has also reported 12 minor injuries and 12 alleged crashes potentially linked to the defect, though most incidents were not crash-related.
What GM Owners Should Do Next
At this time, the investigation remains open and no new recalls have been announced. However, affected owners should take precautionary steps:
- Contact a GM dealer to verify if their vehicle is part of any recall or inspection campaign.
- Report symptoms such as knocking noises, loss of power, or sudden stalling to NHTSA at nhtsa.gov/vehicle-complaint .
- Check recall status using their Vehicle Identification Number (VIN) at nhtsa.gov/recalls .
During the prior recall, GM advised dealers to inspect engines and replace them if damage was found. Vehicles that passed inspection received higher viscosity engine oil, a new oil cap, and a replacement oil filter to help prevent failure.
How GM Owners Can Take Back Control
While this investigation has started, no official recalls have been announced yet. Many owners continue to be unhappy with the solutions provided by automakers. These problems have the potential to escalate into further action, underlining the importance of protecting consumer rights.
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