GMC Sierra Denali Classic 2007 Owner's Manual page 163

Manual Operation
You may manually adjust the air delivery mode or
fan speed.
w9x
(Fan): The switch with the fan symbol
allows you to manually adjust the fan speed. Press
the up arrow to increase fan speed and the
down arrow to decrease fan speed.
Pressing this button when the system is off will
turn the system on.
C
(Mode): Press this button to manually change
the direction of the airflow in your vehicle.
Repeatedly press the button until the desired
mode appears on the display.
If you press the mode button to select an air
delivery mode, the display will change to show you
the selected air mode delivery. The display will
then show the current status of the system. When
the system is turned off, the display will go
blank after displaying the current status of the
system.
H
(Panel): This setting will deliver air to the
instrument panel outlets.
)
(Bi-Level): This setting will deliver warmer air
to the floor and cooler air to the instrument
panel outlets.
6
(Floor): This setting will deliver air to the
floor outlets.
-
(Defog): See "Defogging and Defrosting" later
in this section.
@
(Recirculation): Press this button to limit the
amount of outside air entering your vehicle.
The light on the recirculation button will glow. This
is helpful when you are trying to limit odors
entering your vehicle and for maximum air
conditioning performance in hot weather. Press
this button again to allow outside air to enter
the vehicle. The light on the recirculation button
will go off.
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