2005 GMC Safari Owner's Manual - Page 120

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. For delay wiping, slide the switch up to the center position next to the word DELAY on the rear wiper control. The wiper will cycle every nine seconds. To wash the window, push in on the switch. Window washer fluid will continue to spray until the switch is released. The wiper will continue with three more wipes and then return to the setting that was chosen before the lever was pushed. 3-10