2007 GMC Sierra 1500 Pickup Owner's Manual - Page 243

Rear Window Defogger If your vehicle has this feature, the rear window defogger uses a warming grid to remove fog from the rear window. If your vehicle has a sliding rear window, you will not have a rear window defogger. Outlet Adjustment Use the air outlets located in the center and on the side of your instrument panel to direct the airflow. Operation Tips • Keep the hood and front air inlets free of ice, snow, or any other obstruction (such as leaves). The heater and defroster will work better, reducing the chance of fogging the inside of your windows. • When you enter a vehicle in cold weather, set the fan speed to maximum airflow for a few moments before driving. This helps clear the intake ducts of snow and moisture, and reduces the chance of fogging the inside of your window. • Keep the air path under the front seats clear of objects. This helps air to circulate throughout your vehicle. • Adding outside equipment to the front of your vehicle, such as hood-air deflectors, may affect the performance of the heating and air conditioning system. Check with your dealer before adding equipment to the outside of your vehicle. 243 < (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. This button will also activate the heated mirrors, if the vehicle has them. The rear window defogger will automatically turn off several minutes after the button is pressed. Pressing the button while the defogger is running can also turn off the defogger. W (Mirror): If your vehicle does not have a rear defogger and has heated mirrors, your vehicle will have this button to activate them. Notice: Do not use a razor blade or sharp object to clear the inside rear window. Do not adhere anything to the defogger grid lines in the rear glass. These actions may damage the rear defogger. Repairs would not be covered by your warranty.