GM Service Manual Online
For 1990-2009 cars only

For vehicles with a rear climate control system, the rear seat passengers can adjust the direction of the airflow, fan speed and temperature for the rear seating area. This system also works with the main climate control system in the vehicle.


Object Number: 2047638  Size: B3

The rear climate control system is located on the back of the center console.

  1. Display

  2. Fan Control

  3. Temperature Control

  4. Air Delivery Mode Control

AUX (Auxiliary): Press the AUX button located on the front climate control panel to turn the rear climate control system on or off. When turned on the rear system operates in automatic mode and the temperature settings selected for the front climate control panel will also be selected for the rear passengers.

To adjust the rear climate control system, the rear passenger can select a different temperature, mode or fan speed. Whenever the rear passengers have adjusted settings on the rear climate control system, the AUX light is lit on the front climate control system.

When the front climate control system is turned off or in defrost mode, the rear climate control system is turned off. The rear system will turn back on once another front mode is selected.

For more information on how to use the front climate control system, see Dual Climate Control System. For more information on the air outlets, see Outlet Adjustment.

Automatic Operation

(Fan Control): Press until AUTO appears on the display to place the system in automatic mode. When automatic operation is active, the system automatically controls the fan speed. If in auto fan mode, pressing the up arrow button will cancel automatic operation and places the system in manual mode. If in auto mode, pressing the down arrow will turn the rear climate control system off.

(Air Delivery Mode Control): Press until AUTO appears on the display to place the system in automatic mode. When automatic operation is active, the system controls the air delivery mode.

Manual Operation

(Fan Control): Press to increase or decrease the fan speed.

(Temperature Control): Press to increase or decrease the temperature for the rear seat passengers. Once the rear temperature setting is changed from following the front temperature setting, it will no longer follow changes to the front temperature setting until the front climate control AUX button resets it.

(Air Delivery Mode Control): Press these buttons to change the air delivery mode. If in AUTO air delivery mode, pressing the up arrow button will cancel automatic operation and place the system in manual mode.

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

(Bi-Level): Air is divided between the upper outlets and the floor outlets.

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