GM Service Manual Online
For 1990-2009 cars only

The windshield wiper/washer system consists of the following components:

    â€¢ A permanent-magnet
    â€¢ Depressed-park
    â€¢ A wiper motor
    â€¢ A transmission
    â€¢ Wiper arm and blade assemblies
    â€¢ A washer pump mounted on a washer fluid reservoir
    â€¢ A wiper/washer switch

Pulse and timing functions, along with the demand wash function, are controlled by a printed circuit board in the wiper motor cover. The wiper motor also is equipped with radio frequency interference (RFI) suppression.

Depressed-park positioning is accomplished by an external drive mechanism on the wiper motor.