GM Service Manual Online
For 1990-2009 cars only

Rear Climate Control System Option B, Uplevel

Your vehicle may have a rear climate control system that allows the driver to adjust the fan speed for the rear seating area. This system works with the main climate control system in your vehicle.


Object Number: 1488346  Size: B2

This lever is located below the main climate control system on the instrument panel. Use this lever to adjust the fan speed for the rear seat passengers.

(Fan): Slide the lever to 1, 2, or 3 to increase or decrease airflow to the rear seating area. Slide the fan knob to 0 to turn the fan off.

AUX: Slide the lever to AUX to allow the rear passengers to adjust the temperature and airflow to the rear seating area.

Your vehicle may also have a rear climate control system that allows the rear passengers to adjust the temperature and fan speed for the rear seating area.

When the front climate control is in AUX and the rear climate control fan or temperature button is pressed, the display will show the same airflow modes as the front climate control system. See Dual Climate Control System .


Object Number: 1693503  Size: B1

The front control must be in AUX position to enable adjustment of the temperature and fan speed on the rear control system. If it is not in AUX, pressing the fan or temperature button on the rear climate control will show a DISABLED message on the rear seat entertainment system display.

(Decrease Setting): Press this button to decrease the fan or temperature setting when arrows are active in the display.

(Increase Setting): Press this button to increase the fan or temperature setting when arrows are active in the display.

(Fan) (Temperature): Press this button once to enable adjustment of the fan speed. After pressing this button, the current fan speed setting will be highlighted and appear in the on screen display. The arrows indicate that to increase or decrease fan speed, you need to press either the left or right arrow button. The on screen display will disappear after a few seconds. Press this button twice to enable temperature adjustment. After pressing this button, the current temperature settings will be highlighted and appear in the on screen display. The arrows indicate that to increase or decrease temperature, you need to press either the left or right arrow button. The on screen display will disappear after a few seconds. Pressing this button a third time will turn off the on screen display.

Press the up and down arrows to toggle between the fan and temperature settings.

Rear Air Outlets

The outlet behind the left rear seat is the cold air return outlet. Be sure to keep it free from obstructions. Also, keep the area around the base of the center instrument panel console, between and under the front seats, free of objects that could also obstruct airflow to the rear seating area.

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

Rear Climate Control System Option A, Uplevel

Your vehicle may have a rear climate control system that allows the driver to adjust the fan speed for the rear seating area. This system works with the main climate control system in your vehicle.


Object Number: 1488346  Size: B2

This lever is located below the main climate control system on the instrument panel. Use this lever to adjust the fan speed for the rear seat passengers.

(Fan): Slide the lever to 1, 2, or 3 to increase or decrease airflow to the rear seating area. Slide the fan knob to 0 to turn the fan off.

AUX: Slide the lever to AUX to allow the rear passengers to adjust the temperature and airflow to the rear seating area.

Your vehicle may also have a rear climate control system that allows the rear passengers to adjust the temperature and fan speed for the rear seating area.

When the front climate control is in AUX and the rear climate control fan or temperature button is pressed, the display will show the same airflow modes as the front climate control system. See Dual Climate Control System


Object Number: 1510591  Size: B3

The front control must be in AUX position to enable adjustment of the temperature and fan speed on the rear control system. If it is not in AUX, pressing the fan or temperature button on the rear climate control will show a DISABLED message on the rear seat entertainment system display.

(Decrease Setting): Press this button to decrease the fan or temperature setting when arrows are active in the display.

(Increase Setting): Press this button to increase the fan or temperature setting when arrows are active in display.

(Fan): Press this button to increase or decrease fan speed. After pressing this button, arrows and a fan will appear in the display. The arrows indicate that to increase or decrease fan speed, you need to press either the left or right arrow button. The displayed arrows and fan will disappear after a few seconds.

(Temperature): Press this button to increase or decrease temperature. After pressing this button, arrows and a temperature scale will appear in the display. The arrows indicate that to increase or decrease temperature, you need to press either the left or right arrow button. The displayed arrows and temperature scale will disappear after a few seconds.

Rear Air Outlets

The outlet behind the left rear seat is the cold air return outlet. Be sure to keep it free from obstructions. Also, keep the area around the base of the center instrument panel console, between and under the front seats, free of objects that could also obstruct airflow to the rear seating area.

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