GM Service Manual Online
For 1990-2009 cars only

The heating, cooling, and ventilation for the vehicle can be controlled with this system.


Object Number: 1967237  Size: G3

Fan Control

(Fan): Turn the center knob toward 4 to turn the system on or increase fan speed.

If the airflow seems low when the fan is at the highest setting, the passenger compartment air filter may need to be replaced. For more information, see Passenger Compartment Air Filter and Scheduled Maintenance .

Temperature Control

Turn the right knob clockwise or counterclockwise to increase or decrease the temperature inside the vehicle.

Air Delivery Mode Control

Turn the left knob to select from the following modes:

(Vent): Air is directed to the upper instrument panel outlets.

(Bi-Level): Air is directed to the upper instrument panel outlets and the floor outlets.

(Floor): Air is directed to the floor and side window outlets.

(Defog): Air is directed between the windshield, side windows, instrument panel outlets and the floor outlets. Use the defog mode to clear the inside of the windshield of fog or moisture and to warm the passengers. The air conditioning compressor runs automatically in this setting without pressing A/C, unless the outside temperature is at or below 32°F (0°C).

(Defrost): Air is directed to the windshield, instrument panel outlets and the side windows. Use the defrost mode to remove fog or frost from the outside of the windshield more quickly. The air conditioning compressor runs automatically in this setting without pressing A/C, unless the outside temperature is at or below 32°F (0°C). Do not drive the vehicle until all the windows are clear.

Air Conditioning

For vehicles with this feature, there will be the following controls:

A/C (Air Conditioning): Press to turn the air conditioning system on or off. An indicator light shows that it is on.

MAX A/C (Maximum Air Conditioning): Press the A/C and recirculation buttons at the same time to select MAX A/C. On hot days, open the windows to let hot inside air escape; then close them. The vehicle will cool quicker and the A/C system operates more efficiently.

Because the A/C system removes moisture from the air, it is normal for a small amount of water to drip under the vehicle while idling or just after turning the engine off.

Recirculation

(Recirculation): Press to turn the recirculation mode on or off. An indicator light shows that it is on. This mode recirculates the air inside the vehicle and helps to heat or cool the air more quickly. It can be used to prevent outside air and odors from entering the vehicle. Press the button again to turn the recirculation mode off and the outside air mode on. Recirculation is automatically turned off when the climate control system mode knob is turned to defog, defrost, or is positioned between modes.

Rear Window Defogger

The rear window defogger uses a warming grid to clear fog from the rear window. It will only work when the ignition is in the ON/RUN position.

(Rear Defogger): Press to turn the rear window defogger on or off. An indicator light shows that it is on. The rear window defogger stays on until it is manually turned off. Clear any snow from the rear window.

If the ignition is turned off, while the rear window defogger is on, the defogger turns back on automatically when the ignition is in the ON/RUN position again.

Notice: Do not use a razor blade or sharp object to clear the inside rear window. Do not adhere anything to the defogger grid lines in the rear glass. These actions may damage the rear defogger. Repairs would not be covered by your warranty.