Feds probing GM engine failures in nearly 900K vehicles — including its best-selling model

Investigation Overview - US auto safety regulators have opened an investigation into General Motors vehicles equipped with certain V8 engines, including the best-selling Silverado, due to complaints of engines seizing up without warning [1] - The National Highway Transportation Safety Administration (NHTSA) is investigating an estimated 877,710 vehicles after receiving 39 complaints from users of GM vehicles equipped with L87 V8 engines [1] Safety Concerns - Complainants reported no detectability prior to engine failure, which increases the risk of crashes resulting in injury and/or property damage [2] - A bearing failure can cause the engine to seize or a breaching of the engine block by a connecting rod [2] Affected Vehicles - The preliminary investigation includes the following models: 2019-2024 Chevrolet Silverado 1500, 2021-2024 Chevrolet Tahoe, 2021-2024 Chevrolet Suburban, 2019-2024 GMC Sierra 1500, 2021-2024 GMC Yukon, 2021-2024 GMC Yukon XL, 2021-2024 Cadillac Escalade, and 2021-2024 Cadillac Escalade ESV [3] Market Performance - General Motors was the US leader in 2024 auto sales, posting a 4.3% increase in sales for the year, its best performance since 2019 [5] - The Silverado pickup truck was the second-best selling vehicle in the US last year [4][5]