GM Genuine Parts Windshield Wiper and Washer Switches are designed, engineered, and tested to rigorous standards, and are backed by General Motors. It activates and adjusts the speed of the windshield wipers, causing them to wipe away rain and other debris from your 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).