DETROIT — General Motors extended its string of safety problems, announcing Friday three more recalls, including a large one involving its top-selling vehicle.
The recalls bring the company’s total for the year to 48, covering more than 20 million cars and trucks.
Friday’s recalls cover 474,000 vehicles worldwide. The largest affects almost 467,000 four-wheel-drive Chevrolet Silverado and GMC Sierra pickups, as well as GMC Yukon and Chevrolet Tahoe and Suburban SUVs. The Sierra is GM’s top-selling vehicle.
The company said a software glitch can cause the transmission transfer cases to shift into neutral on their own on 2014 and 2015 models. That can cause loss of power, or it can let the trucks roll away if parked. GM says it knows of no crashes or injuries. Dealers will recalibrate the software.
Also recalled: nearly 4,800 Chevrolet SS and Caprice police cars for a faulty windshield wiper module, and about 2,000 2014 Chevrolet Corvettes for shock absorbers whose weld could fracture.