GM Service Manual Online
For 1990-2009 cars only

The rear window wiper/washer system on utility vehicles uses a positive-park, permanent-magnet wiper motor mounted on the tailgate. A wet-arm wiper assembly attaches directly to the wiper motor. Operation is controlled by the rear wiper/washer switch. The rear wiper/washer switch, when in LO, will activate the wiper automatically in a delay mode. When in HI, the wiper will operate continuously. Pressing the rear wiper/washer WASH button while the switch is in HI position will activate the washer pump. When the WASH button is pressed while the wiper/washer switch is in the LO position, the wiper function changes from delay to continuous operation while the WASH button is held and continues for approximately three wipe cycles after the WASH button is released.

The wiper motor is serviced as a unit. No overhaul kits are available. The controller is part of the wiper motor and cannot be serviced separately.

The washer hose routes from the solvent container, along the cowl, and passes through a grommet near the center of the cowl. The hose follows the rear lamp harness routing along the center of the vehicle's floor. After the second seat, it continues along the left side of the cargo area, over the left rear wheel area, then up the left rear corner of the vehicle. The washer hose pases through a second grommet on the rear window, then attaches to the wiper arm.