2003 Chevrolet Cavalier Owner's Manual - Page 128

To defog the side windows, set the right knob to floor and the fan knob to the highest setting. You can use the air conditioning while in this setting by pressing the air conditioning button. In both cases, aim the side outlets toward the side windows. For increased airflow to the side outlets, close the center outlets. Do not drive the vehicle until all the windows are clear. The rear window defogger will turn off approximately 10 minutes after the button is pressed. If turned on again, the defogger will only run for approximately five minutes before turning off. The defogger can also be turned off by pressing the button again or by turning off the engine. Rear Window Defogger The rear window defogger uses a warming grid to remove fog from the rear window. The rear window defogger will only work when the ignition is in RUN. (Rear): Press the button to turn the rear window defogger on or off. Be sure to clear as much snow from the rear window as possible. An indicator light above the button will come on to let you know that the rear window defogger is activated. 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. @ 3-19