2004 Pontiac GTO Owner's Manual - Page 119

-(Defog): This mode directs the air to the windshield and to the floor outlets. When you select this mode, the system turns off recirculation automatically. The recirculation mode cannot be selected while in the defog mode. Do not drive the vehicle until all the windows are clear. To help clear the side windows quickly while using air conditioning, do the following: 1. Select the bi-level mode. 2. Select the highest fan speed. 3. Select A/C. 4. Select the temperature. Rear Window Defogger The rear window defogger uses a warming grid to remove fog or frost from the rear window. < (Rear Defogger): Press this button on the right dial to turn the rear window defogger on or off. An indicator light in the button will come on to let your know that the rear window defogger is activated. Be sure to clear as much snow from the rear window as possible. The rear window defogger will turn off about 15 minutes after the button is pressed. The defogger can also be turned off by pressing the button again or by turning off the engine. Notice: Don't use anything sharp on the inside of the rear window. If you do, you could cut or damage the warming grid, and the repairs wouldn't be covered by your warranty. Do not attach a temporary vehicle license, tape, a decal or anything similar to the defogger grid. 1 (Defrost): This mode directs the air to the windshield. In this mode, the system will automatically force outside air into your vehicle and run the air-conditioning compressor. Recirculation cannot be selected while in the defrost mode. To help clear the windshield quickly, do the following: 1. Select the defrost mode. 2. Select the highest temperature. 3. Select the highest fan speed. 3-21