2000 Pontiac Grand Prix Owner's Manual - Page 165

Heating On cold days use FLOOR with the temperature knob 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 UPPER, with the A/C button off, to direct outside air through your vehicle. Your vehicle also has the flow-through ventilation system described later in this section. Defogging and Defrosting Your system has two settings for clearing the front and side windows. To defrost the windows quickly, use DEFROST with the temperature knob all the way in the red area. To warm passengers while keeping the windows clear, use DEFOG. Air Conditioning with Automatic and Auxiliary Temperature Control (If Equipped) With this system, you set a "desired cabin" temperature. You can then either let the system automatically control airflow direction and amount (to maintain the desired cabin temperature) or you can manually adjust it. The system works best if you keep your windows closed while using it. 3-4