2002 Chevrolet Corvette Owner's Manual - Page 188

Defogging and Defrosting To rapidly defrost the windshield, the FRONT defrost mode (automatic electronic dual climate control system) or defrost mode (manual control system) should be used and the fan speed should be adjusted to the highest speed. With the manual control system, turn the temperature control knob all the way to the red area. To keep the windshield clear and provide heated air to the floor area of the vehicle, use the defog setting. Your vehicle is equipped with side window defogger vents located near the side rearview mirrors. Rear Window Defogger REAR: This button turns the rear defogger and the heated outside mirrors on. The light on the button will come on when operating. The system automatically shuts off after approximately 15 minutes. If further defogging is desired, press the button again and it will operate for about seven and a half more minutes. The rear window defogger operates only when the engine is running. The rear window defogger uses a warming grid to remove fog from the rear window. Do not attach anything like a temporary vehicle license or a decal across the defogger grid on the rear window. NOTICE: Don't use a razor blade or something sharp on the inside of the rear window. If you do, you could cut or damage the warming grid, and repairs wouldn't be covered by your warranty. 3-12