Chevrolet 2008 Silverado 1500 Pickup Owner's Manual page 210

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.
The air delivery mode setting is displayed and the
AUTO light turns off. The fan remains under automatic
control.
3-32
C
to
G
to manually change the
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.
@
(Recirculation): Press this button to turn the
recirculation mode on. When the button is pressed, an
indicator light comes on.
This mode keeps outside air from entering the vehicle.
It can be used to reduce outside air and prevent
odors from entering the vehicle. Recirculation may also
help cool the air inside the vehicle more quickly once
the temperature inside the vehicle is less than the
outside temperature.