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DC (Fan): Press the D or C buttons to increase or
decrease the fan speed. Pressing either button cancels
automatic operation and the system goes into manual
mode. 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 on page 3-28 and
Scheduled Maintenance on page 6-4.
# (Air Conditioning): Press this button to override
the automatic system and turn the air conditioning
system on or off. When in AUTO, the air conditioning
compressor will come on automatically, as necessary.
The air conditioning system removes moisture from
the air, so a small amount of water might drip
underneath the vehicle while idling or after turning off
the engine. This is normal.
M / F (Recirculation/Outside Air): Press this
button to switch between recirculation and outside air.
Whenever the button is pressed, the indicator light comes
on for the mode being used. The recirculation mode
recirculates air inside the vehicle. It can be used to
prevent outside air and odors from entering the vehicle or
to help cool the air inside the vehicle more quickly. Press
the auto button to have the system select the best air
delivery mode for your 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.
The outside air mode pulls fresh air from outside the
vehicle. Outside air is always selected in defrost mode to
prevent fogging.
_ (Heated Windshield Washer, If Equipped): For
more information, see Windshield Washer on page 3-11.
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