2000 Pontiac Bonneville Owner's Manual - Page 169
2000 Pontiac Bonneville Manual
Page 169 highlights
Heating If you have the standard system, on cold days use FLOOR with the temperature knob in the red area. If you have the electronic system, press AUTO and adjust the temperature by turning the TEMP knob up or down. You may also adjust the electronic system manually by pressing the MODE button and selecting FLOOR. Again, adjust the temperature by turning the TEMP knob up or down. With either system, outside air will be heated and sent through the floor outlets. The heater works best if you keep your windows closed while using it. Defogging and Defrosting On cool, humid days, use DEFOG to keep the windshield and side windows clear. Use FRONT defrost to remove fog or ice from the windshield quickly in extremely humid or cold conditions. If you have the standard system, select DEFOG and adjust the fan speed to your comfort level. Turn the A/C on to help dehumidify the air. Use FRONT defrost with the temperature toward the red area and the fan control toward high. If you have the electronic system and select FRONT defrost or DEFOG from AUTO, the system will control the fan speed. Adjust the temperature and fan speed to your comfort level. After the windshield is clear, adjust the temperature to your normal setting and select the AUTO button and return to AUTO mode and fan control. For maximum FRONT defrost performance under extreme icing or frosting conditions, increase the temperature setting to 90_F (33_C) and increase the fan speed to high. 3-9