The National Highway Traffic Safety Administration’s Office of Defects Investigation has begun looking into engine failures involving an estimated 877,710 vehicles from GM. The vehicles are full-sized trucks and SUVs equipped with the 6.

U.S. auto safety regulators have opened an investigation into complaints that General Motors vehicles equipped with certain V8 engines, including its best-selling Silverado, can seize up without warning.

The National Highway Traffic Safety Administration (NHTSA) has opened an investigation into reports of engine failures involving General Motors’ 6.2-liter L87 V8 engine.The popular and powerful small-block V8 powers GM's full-size pickup and SUV offerings from all three of its key brands,

The U.S. National Highway Traffic Safety Administration (NHTSA) has initiated an investigation into 877,710 General Motors vehicles.

NHTSA said it was investigating an estimated 877,710 vehicles after receiving 39 complaints from users of GM vehicles equipped with L87 V-8 engines.