2005 Chevrolet Astro Owner's Manual - Page 126

Windshield Washer L(Washer Fluid): There is a paddle marked with the windshield washer symbol at the top of the multifunction lever. To spray washer fluid on the windshield, push the paddle. The wipers will clear the window and then either stop or return to your preset speed. Rear Window Washer/Wiper Your vehicle may have this feature. The rear window washer/wiper is controlled by using the switch located on the instrument panel, next to the audio system. {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. The wipers will clear the window and then either stop or return to your preset speed. To turn the wiper on, slide the switch all the way up to ON. 3-10