GM Service Manual Online
For 1990-2009 cars only

When you push the wash button for more than one second, washer solvent sprays onto the windshield as long as you hold the button. Wiper activity will continue for about 6 seconds after the button is released.

Rotating the wiper switch to the LO or HI speed position closes the respective brush circuit and the wiper motor runs at the corresponding speed.

Rotating the wiper switch to the INT mode operates the wiper motor intermittently. The delay varies by rotating the INT TIME switch sleeve back and forth.

Washer hose routing begins at two nozzles that mount to the wiper arms. The hose clips in various places to the wiper arm and the cowl, then attaches to the washer pump.