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: 1394338  Size: B3

Operation

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

(Fan): Turn the center knob clockwise or counterclockwise to increase or decrease the fan speed. In any setting other than off, the fan will run continuously with the ignition on. To turn off the air completely, turn fan to 0 and select Recirculate.

Use the right knob to select from the following modes:

There are two minor detents between each mode to finely adjust airflow position.

(Vent): This mode directs air to the instrument panel outlets.

(Bi-Level): This mode directs approximately half of the air to the instrument panel outlets, and then directs the remaining air to the floor outlets.

(Floor): This mode directs most of the air to the floor outlets with some air directed to the windshield.

You can also select modes by using the following buttons:

(Recirculate): Press the bottom right button to recirculate cabin air through 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. An indicator light above the button will come on in this mode. 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.

(Air Conditioning): Press this button to turn the air-conditioning system on or off. When this button is pressed, an indicator light above the button will come on to let you know the air conditioning is activated. Air-conditioning can be selected in any mode as long as the fan switch is on.

The air-conditioning system removes moisture from the air, so you may sometimes 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 or frost 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. Use the defog mode to clear the windows of fog or moisture and warm the passengers. Use the defrost mode to remove fog or frost from the windshield more quickly. When you select either of these modes (or the floor mode which also helps defog the windows slightly), the system runs the air-conditioning compressor and cancels recirculation mode to dry the air; however, the recirculation light will stay on. For best results, clear all snow and ice from the windshield before defrosting.

Turn the right knob to select the defog or defrost mode.

(Defog): This mode directs half of the air to the windshield and the side window outlets and half to the floor outlets.

(Defrost): This mode directs most of the air to the windshield and the side window outlets, with some air directed to the floor outlets.

Rear Window Defogger

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

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

(Rear): Press the button to turn the rear window defogger on or off. An indicator light above the button will come on to let you know that the rear window defogger is activated.

The rear window defogger will only work when the ignition is in RUN. The rear window defogger will stay on for approximately 15 minutes after the button is pressed, unless the ignition is turned to ACC or LOCK. If turned on again, the defogger will only run for approximately five minutes before turning off. The defogger can also be turned off by pressing the button again or by turning off the engine.

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.