2004 GMC Yukon Owner's Manual - Page 169

Rear Window Washer/Wiper This knob is located on the instrument panel to the left of the steering wheel. Cruise Control 9(Off): This position turns the system off. To turn the rear wiper on, turn the knob to either 1 or 2. For long delayed wiping, turn the knob to 1. For short delayed wiping, turn the knob to 2. R(On): This position activates the system. 9(Off): symbol. To turn the wiper off, turn the knob to this + (Resume/Accelerate): Push the lever to this symbol to make the vehicle accelerate or resume to a previously set speed. =(Washer Fluid): To wash the window, press the knob with this symbol. The rear window washer uses the same fluid bottle as the windshield washer. However, the rear window washer will run out of fluid before the windshield washer. If you can wash your windshield but not your rear windows, check the fluid level. T(Set): Press this button to set the speed. 3-11