Manual Operation - GMC Sierra 2008 Owner's Manual

Manual Operation

The air delivery mode or fan speed can be manually
adjusted.
DC
(Fan): These buttons let you manually adjust the
D
fan speed. Press to increase fan speed and
decrease fan speed.
Pressing either fan button while the system is off turns the
system on. Pressing either fan button while in automatic
control places the fan under manual control. The fan
setting remains displayed and the AUTO light turns off.
The air delivery mode remains under automatic control.
HG H
(Mode): Press and
direction of the airflow in the vehicle. Repeatedly press
either button until the desired mode appears on the
display. Pressing either mode button while the system
is off changes the air delivery mode without turning
the system on. Pressing either mode button while in
automatic control places the mode under manual control.
C
to
G
to manually change the
The air delivery mode setting is displayed and the AUTO
light turns off. The fan remains under automatic control.
H
(Vent): Air is directed to the instrument panel
outlets.
)
(Bi-Level): Air is directed partly to the instrument
panel outlets and to the floor outlets. A little air is
directed towards the windshield and side window outlets.
Cooler air is directed to the upper outlets and warmer
air to the floor outlets.
6
(Floor): Air is directed to the floor outlets, with
some to the windshield, side window outlets, and
second row floor outlets. In this mode, the system
will automatically select outside air.
-
(Defog): See "Defogging and Defrosting" later in
this section.
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