Manual Operation
(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.
See also:
Instrument Panel Fuse Block
The instrument panel fuse block access door is located on the driver side edge
of the instrument panel.
Pull off the cover to access the fuse block.
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