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.

Complaints lead NHTSA to examine certain Silverado, GMC Sierra, Chevrolet Tahoe, Suburban, GMC Yukon and Cadillac Escalade trucks and SUVs.

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.

US 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.