2008 Chevrolet Uplander Owner's Manual - Page 187

Rear Window Defogger If your vehicle has a rear window defogger a warming grid is used to remove fog from the rear window. Dual Climate Control System Your vehicle may have a dual climate control system. With this system you can control the heating, cooling, and ventilation for your vehicle. < REAR: Press this button to turn the rear window defogger on or off. An indicator light in the button will come on to let you know that the rear window defogger is activated. The rear window defogger will turn off about 15 minutes after the button is pressed. If turned on again, the defogger will only run for about five minutes before turning off. The defogger can also be turned off by pressing the button again or by turning off the engine. Notice: Do not use anything sharp on the inside of the rear window. If you do, you could cut or damage the warming grid, and the repairs would not be covered by your warranty. Do not attach a temporary vehicle license, tape, a decal or anything similar to the defogger grid. Operation 9 (Fan): Turn the left knob clockwise or counterclockwise to increase or decrease the fan speed. Turn the knob to 0 to turn off the fan. The fan must be turned on for the air conditioning compressor to operate. 3-27