2008 Chevrolet Malibu Owner's Manual - Page 160

Defogging and Defrosting Fog on the inside of windows is a result of high humidity (moisture) condensing on the cool window glass. This can be minimized if the climate control system is used properly. There are two modes to choose from to clear fog or frost from the windshield. Rear Window Defogger The rear window defogger uses a warming grid to remove fog from the rear window. - (Defog): Use the defog mode to clear the windows of fog or moisture and warm the passengers. This setting delivers air to the floor and windshield outlets. 0 (Defrost): Use the defrost mode to remove fog or frost from the windshield more quickly. The system automatically controls the fan speed if defrost is selected from the AUTO mode. If the outside temperature is 40°F (4°C) or warmer, the air conditioning compressor automatically runs to help dehumidify the air and dry the windshield. The air conditioning indicator light blinks three times if the compressor is turned off while in this mode. < (Rear): Press this button to turn the rear window defogger on or off. An indicator light above the button comes on to show that the rear window defogger is activated. If driving below 50 mph (80 km/h), the rear window defogger turns off about 15 minutes after the button is pressed. If additional warming time is needed, press the button again. If the vehicle's speed is maintained above 50 mph (80 km/h), the rear window defogger remains on once the button is pressed. If the vehicle has heated outside mirrors, the surface of the outside mirrors will also heat when the rear window defogger is activated. See Outside Power Mirrors on page 2-41. 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. 3-28