GM Genuine Parts Windshield Wiper Motors are designed, engineered, and tested to rigorous standards, and are backed by General Motors. Windshield wiper motors are small electric motors that generate enough force to accelerate the wiper blades across the windshield. GM Genuine Parts are the true OE parts installed during the production of or validated by General Motors for GM vehicles. Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE).