2007 GMC Acadia Owner's Manual - Page 210

Rear Window Defogger The rear window defogger uses a warming grid to remove fog from the rear window. Outlet Adjustment Use the slider switch in the center of the outlet, to change the direction of the air flow. Use the thumbwheel near the outlet to control the amount of air flow or to shut off the airflow completely. Keep all outlets open whenever possible for best system performance. < (Rear Window Defogger): Press this button to turn the rear window defogger on or off. The rear window defogger stays on for about 10 minutes after the button is pressed, before turning off. The defogger can also be turned off by pressing the button again or by turning off the engine. Do not drive the vehicle until all the windows are clear. If your vehicle has heated outside rearview mirrors, the mirrors will heat to help clear fog or frost from the surface of the mirror when the rear window defog button is pressed. 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. Operation Tips • Clear away any ice, snow, or leaves from the air inlets at the base of the windshield that can block the flow of air into the vehicle. • Use of non-GM approved hood deflectors can adversely affect the performance of the system. • Keep the path under all seats clear of objects to help circulate the air inside the vehicle more effectively. • If fogging reoccurs while in vent or bi-level modes with mild temperature throughout the vehicle, turn on the air conditioner to reduce windshield fogging. 210