The National Highway Traffic Safety Administration (NHTSA) is investigating GM 2500- and 3500-series pickup trucks after receiving 19 complaints alleging loss of power braking or power steering.
The alleged defect, which could affect 660,000 trucks, is blamed for at least two crashes and one injury.
GM also is facing a separate government investigation into alleged failure of brakes, power steering and windshield wipers, the National Highway Traffic Safety Administration said. NHTSA’s investigation could affect more than 1.2 million vehicles.