GM Service Manual Online
For 1990-2009 cars only

The windshield wiper paddle is located on top of the multifunction lever.

(Washer Fluid): Push the paddle to spray washer fluid on the windshield. The wipers will clear the window and then either stop or return to the preset speed.

Caution: In freezing weather, do not use your washer until the windshield is warmed. Otherwise the washer fluid can form ice on the windshield, blocking your vision.