GM Service Manual Online
For 1990-2009 cars only

With this system the heating, cooling and ventilation can be controlled.

For vehicles with the remote start feature and it is activated, the climate control system automatically cools the vehicle if the temperature is greater than 90°F (32°C) and heats the vehicle if the temperature is below 37°F (3°C). If the temperature is between 37°F (3°C) and 90°F (32°C), the last control setting selected when the engine was running will be used. Normal operation and the last setting of the climate control system will return after the key is turned to the ON/RUN position.


Object Number: 2047651  Size: B2
  1. Fan Control

  2. Temperature Control

  3. Air Delivery Mode Control

  4. Recirculation

  5. Air Conditioning

  6. Rear Window Defogger

OFF: Turn the fan control knob to this position to turn the climate control system off.

(Fan): Turn the knob by this symbol, located on the left side of the climate control panel, clockwise or counterclockwise to increase or decrease the fan speed. The fan speed is temporarily reduced when adjusting modes, but resumes the original speed when the transition to the new mode is complete.

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

Air Delivery Mode Control: Turn clockwise or counterclockwise to change the direction of the airflow inside the vehicle.

Select from the following air delivery modes:

(Vent): Air is directed to the instrument panel outlets. If driving in city traffic, and the vehicle is stopped and idling, or the weather is hot, turning on the recirculation mode helps to prevent the air inside the vehicle from becoming stale. After five minutes recirculate will allow some outside air into the vehicle.

(Bi-Level): Air is divided between the instrument panel and floor outlets. Some air may be directed toward the windshield. Slightly cooler air is directed to the instrument panel outlets and warmer air is directed to the floor outlets.

(Floor): Air is directed to the floor outlets, with some air directed toward the side window outlets and windshield. In this mode, the system automatically uses outside air. The air conditioning compressor will be engaged unless the outside temperature is 40°F (4°C) or below.

(Defog): This mode clears the windows of fog or moisture. Air is divided between the windshield and the side window outlets, and the floor outlets. In this mode, the system turns recirculation off and runs the air conditioning compressor unless the outside temperature is near or below freezing. Pressing the recirculation button will have no effect other than turning on the indicator light while in defog mode.

(Defrost): This mode clears the windows of fog or frost more quickly. Air is directed to the windshield and the side window outlets, with some air directed to the floor outlets. In this mode, the system turns recirculation off and runs the air conditioning compressor unless the outside temperature is near or below freezing. Pressing the recirculation button will have no effect other than turning on the indicator light while in defrost mode.

(Air Conditioning): Press to turn the air conditioning system on or off. An indicator light turns on to show that the air conditioning is on. Air conditioning can be selected in any mode as long as the fan switch is on. The indicator light changes with each button press even when conditions prevent operation.

On hot days during the vehicle's initial start-up, 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.

For quicker cool down on hot days, do the following:

  1. Select mode.
  2. Press .
  3. Press .
  4. Select the coolest temperature.
  5. Select the highest fan speed.

The air conditioning system removes moisture from the air, so a small amount of water might drip under the vehicle while idling or after turning off the engine. This is normal.

Using these settings together for long periods of time may cause the air inside the vehicle to become too dry. To prevent this, after five minutes recirculate will allow some outside air into the vehicle.

(Recirculate): Press to turn the recirculation mode on. An indicator light comes on to show that recirculation is on. This mode recirculates and helps to quickly heat or cool the air inside the vehicle. It can be used to prevent the outside air and odors from entering the vehicle. Operation in this mode during periods of high humidity and cool outside temperatures may result in increased window fogging. If window fogging is experienced, select the defrost mode. To prevent the air inside the vehicle from becoming stale, after five minutes recirculation lets some outside air into the vehicle.

Rear Window Defogger

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

(Rear): Press turn the rear window defogger on or off. An indicator light comes on to show that the rear window defogger is on.

The rear window defogger only works when the ignition is in ON/RUN. The rear window defogger stays on for about 20 minutes after the button is pressed. If turned on again, the defogger only runs for about 20 minutes before turning off. The defogger can also be turned off by turning off the engine.

The heated outside rearview mirrors, help to clear fog or frost from the surface of the mirror when the rear window defog button is pressed.

Do not drive the vehicle until all windows are clear.

Notice: Do not use anything sharp on the inside of the rear window. If you do, you could cut or damage the warming grid, and the repairs would not be covered by the vehicle warranty. Do not attach a temporary vehicle license, tape, a decal or anything similar to the defogger grid.