2002 Pontiac Grand Prix Owner's Manual - Page 163

Heating On cold days select a fan setting and use floor with the temperature levers all the way in the red area. The system will bring in outside air, heat it and send it to the floor ducts. If your vehicle has an engine coolant heater, you can use it to help your system provide warm air faster when it's cold outside 0_F (-18_C) or lower. An engine coolant heater warms the coolant your engine and heating system use to provide heat. See "Engine Coolant Heater" in the Index. Ventilation For mild outside temperatures when little heating or cooling is needed, use a fan setting and vent with the A/C button off, to direct outside air through your vehicle. Defogging and Defrosting Your system has two settings for clearing the front and side windows. To defrost the windows quickly, turn the fan to a high setting and use defroster with the temperature levers all the way in the red area. To warm passengers while keeping the windows clear, use defogger. Rear Window Defogger The rear window defogger uses a warming grid to remove fog from the rear window. The comfort control system has a button to operate your vehicle's rear window defogger. It is marked REAR. Press the button to turn the rear window defogger on or off. When the rear window defogger is operating, an indicator above this button will light. The rear warming grid will turn off after about 15 minutes. If you turn the rear window defogger on again, it will operate for about seven and one half minutes before turning off. The system will turn off when the ignition is turned off. Do not attach anything like a temporary vehicle license or decal across the rear window defogger grid. 3-4