Chevrolet 2009 Express Owner's Manual page 135

Air Delivery Mode Control: Turn the knob clockwise
or counterclockwise to change the current airflow mode.
H
(Vent): Air is directed to the instrument panel
outlets.
)
(Bi-Level): Air is divided between the instrument
panel and floor outlets, with some air directed toward the
windshield.
6
(Floor): Air is directed to the floor outlets with some
air directed to the windshield and side windows.
-
(Defog): This mode clears the windows of fog or
moisture. Outside air is directed to the floor and
defroster outlets. Adjust the temperature knob for
warmer or cooler air. The air conditioning compressor
might turn on in this setting to dehumidify the air.
1
(Defrost): This mode clears the windshield of fog
or frost more quickly. Air is directed to the windshield,
with some to the floor outlets and front side windows.
The air conditioning compressor might turn on in
this setting to dehumidify the air.
Do not drive the vehicle until all the windows are clear.
Vehicles With Air Conditioning
A. Fan Control
B. Temperature Control
C. Air Delivery Mode
Control
On hot days, open the windows to let hot inside air
escape; then close them. This helps to reduce the time
needed for the vehicle to cool down and the system
operates more efficiently.
#
(Air Conditioning): Cools and dehumidifies the air
inside of the vehicle.
V
(Maximum Air Conditioning): Cools the air inside
the vehicle faster, by recirculating the inside air.
D. Rear Window
Defogger
3-19