2004 Chevrolet Malibu Owner's Manual - Page 145

Defogging and Defrosting You can use either defog or front defrost to clear fog or frost from your windshield. Use the defog mode to clear the windows of fog or moisture. Use the front defrost button to defrost the front windshield. Rear Window Defogger If your vehicle has this feature, the lines you see on the rear window warm the glass. The rear window defogger uses a warming grid to remove fog from the rear window. -(Defog): Use this setting to clear the windows of fog or moisture. Turn the mode knob to this position to select this setting. This setting will deliver air to the floor and windshield outlets. 0 (Defrost): Turn the mode knob to this position to defrost the windshield. The system will automatically control the fan speed if you select defrost from AUTO mode. If the outside temperature is 40°F (4°C) or warmer, your air conditioning compressor will automatically run to help dehumidify the air and dry the windshield. The air conditioning indicator light will blink three times if you try to turn off the compressor while in this mode.