GM Service Manual Online
For 1990-2009 cars only

The windshield wiper/washer system consists of a permanent-magnet, depressed-park wiper motor, a transmission, wiper arms and blades, a washer pump mounted on a washer solvent container, and a wiper/washer switch.

The wiper/washer system is a pulse (delay) type. Pulse timing and demand wash functions are controlled electronically.