(Power): Press to turn the climate control system on or off.

When the climate control system is turned off the air inlet defaults to outside air.

(Fan Control): Press the buttons to increase or decrease the fan speed. Pressing either button cancels automatic fan control.

Press AUTO to return to automatic operation. The blower may reduce during an Onstar® session to limit background noise.

If the airflow seems low when the fan speed is at the highest setting, the passenger compartment air filter might need to be replaced. For more information, see Passenger Compartment Air Filter and Maintenance Schedule.

(Air Delivery Mode Control):

Press the buttons to change the direction of the airflow. The current mode appears in the display screen.

Changing the mode cancels the automatic air delivery. Press AUTO to return to automatic operation.

The outboard air outlets always receive some airflow in every mode, except defrost.

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

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

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

In automatic operation, cooler air is directed to the upper outlets and warmer air to the floor outlets.

(Floor): Air is directed to the floor outlets, with some air directed to the windshield and outboard outlets.

(Defog): This mode clears the windows of fog or moisture. Air is directed to the windshield, floor, and side window outlets. When this mode is selected, the system turns off recirculation and runs the air-conditioning compressor unless the outside temperature is at or below freezing. If recirculation is selected while in defog mode, it is cancelled after 10 minutes.

(Defrost): This mode clears the windshield of fog or frost more quickly. Air is directed to the windshield, with some air directed to the side windows. In this mode, the system automatically turns off recirculation and runs the air-conditioning compressor, unless the outside temperature is at or below freezing.

This mode can also cause the fan speed and air temperature to increase.

(Air Conditioning): Press to turn the air conditioning system on or off and override the automatic system. When in AUTO, the air conditioning compressor comes on automatically, as needed.

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

(Recirculation): Press to turn on recirculation. An indicator light comes on. Air is recirculated inside the vehicle. It helps to quickly cool the air inside the vehicle or prevent outside air and odors from entering.

Press the AUTO button to have the system select the best air delivery mode for the temperature setting.

Recirculation is not available in the defrost mode and automatically turns off 10 minutes after defog is selected. This helps to limit window fogging in the vehicle.

Using recirculation for long periods of time could cause the air inside the vehicle to become too dry or stuffy. To prevent this from happening, after the air in the vehicle has cooled, select outside air or press the auto button.

(Outside Air): Press to turn on the outside air. An indicator light turns on. The outside air mode pulls fresh air from outside the vehicle.

Outside air is always selected in defrost mode to prevent fogging.