2001 Chevrolet Impala Owner's Manual - Page 176

Air Conditioning On very hot days, open the windows long enough to let hot, inside air escape. This reduces the time for the vehicle to cool down. Then keep your windows closed for the air conditioner to work its best. For quick cool down on very hot days, turn the mode knob on the control panel to UPPER; push the A/C button on; push the RECIRCULATION button on and move the temperature control(s) all the way into the blue area. If this setting is used for long periods of time, the air in your vehicle may become too dry. For normal cooling on hot days, turn the mode knob on the control panel to UPPER; push the A/C button on; push the OUTSIDE AIR button on and move the temperature control all the way into the blue area. The system will bring in outside air and cool it. On cool, but sunny days, the sun may warm your upper body, but your lower body may not be warm enough. To remedy this you can turn the mode knob on the control panel to BI-LEV. Push the A/C button on and move the temperature control to a comfortable setting. Heating On cold days, turn the mode knob on the control panel to LOWER, push the OUTSIDE AIR button on and move the temperature control all the way in the red area. The system will bring in outside air, heat it and send it to the floor ducts. Ventilation For mild outside temperatures when little heating or cooling is needed, turn the mode knob on the control panel to UPPER; push the A/C button off; push the OUTSIDE AIR button on and move the temperature control(s) to a comfortable setting. 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 control(s) all the way in the red area. To warm passengers while keeping the windows clear, use DEFOG. For more information, see "Recirculation" in the Index. 3-6