GM Service Manual Online
For 1990-2009 cars only

With this system you can control the heating, cooling and ventilation for your vehicle.


Object Number: 868656  Size: B1

Operation

(Fan):  Turn the center knob away from OFF to turn the system on. Turn the knob toward HI to 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 .

To change the current mode, select one of the following:

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

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

(Floor): Air is directed to the floor outlets and to the outboard outlets (for the side windows).

(Recirculation): Press this button, located in the center of the instrument panel to the left of the audio system, to turn the recirculation mode on or off. This mode recirculates the air inside the vehicle. It can be used to prevent outside air and odors from entering your vehicle or to help heat or cool the air inside your vehicle more quickly. When the button is pressed, an indicator light in the button comes on. Press the button again to turn off recirculate and to circulate outside air through the system. The indicator light will go off. Recirculate is automatically turned off when the climate control system mode knob is turned to defog or defrost or is between modes.

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

A/C (Air Conditioning): Press this button, located in the center of the instrument panel to the left of the audio system, to turn the air-conditioning system on or off. When A/C is pressed, an indicator light in the button comes on to let you know that the air conditioning is activated.

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. This helps to reduce the time it takes for the vehicle to cool down. It also helps the system to operate more efficiently.

The air-conditioning system removes moisture from the air, so you might notice a small amount of water dripping underneath your vehicle while idling or after turning off the engine. This is normal.

Defogging and Defrosting

Fog on the inside of windows is a result of high humidity (moisture) condensing on the cool window glass. This can be minimized if the climate control system is used properly. There are two modes to clear fog or frost from the windshield. Use the defog mode to clear the inside of the windshield of fog or moisture and warm the passengers. Use the defrost mode to remove fog or frost from the outside of the windshield more quickly.

(Defog): Air is directed between the windshield, side windows, instrument panel outlets and the floor outlets. The air-conditioning compressor will run 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. The air-conditioning compressor will run 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.

Rear Window Defogger

The rear window defogger uses a warming grid to clear fog from the rear window.


Object Number: 868657  Size: A2

The rear window defogger button is located on the center of the instrument panel, above the audio system. The defogger does not operate with the rear liftglass opened.

The rear window defogger will only work when the ignition is in the ON position.

(Rear Defogger): Press the defogger button to turn the rear window defogger on or off. An indicator light in the button comes on to let you know that the rear window defogger is activated. Be sure to clear as much snow from the rear window as possible.

The rear window defogger will turn off automatically approximately 15 minutes after the button is pressed. The defogger can also be turned off by pressing the button again or by turning off the engine.

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.