Chevrolet TrailBlazer 2007 Owner's Manual page 190

Manual Operation
To change the current setting, select one of the
following:
w9x
(Fan): This button allows you to manually
adjust the fan speed. Press the up arrow to
increase fan speed and the down arrow to
decrease fan speed. The display will change to
show you the selected fan speed and the driver's
side temperature setting for five seconds.
C
(Mode): Press this button to manually change
the direction of the airflow in your vehicle. Keep
pressing the button until the desired mode appears
on the display. The display will change to show
you the selected air delivery mode and the driver's
temperature setting for five seconds.
H
(Vent): This mode directs air to the instrument
panel outlets.
)
(Bi-Level): This mode directs approximately
half of the air to the instrument panel outlets, then
directs the remaining air to the floor outlets. A little
air is directed toward the windshield and the side
window outlets. Cooler air is directed to the upper
outlets and warmer air to the floor outlets.
190
6
(Floor): This mode directs most of the air to the
floor outlets. Some air also comes out of the
defroster and side window outlets. The recirculation
button cannot be selected in floor mode.
@
(Recirculation): Press this button to turn
recirculation mode on or off. When this button is
pressed, an indicator light in the button will
also come on to let you know that it is activated.
Recirculation mode is used to recirculate the
air inside of your vehicle. Use this mode to help
prevent outside odors and/or dust from entering
your vehicle or to help cool the air inside of
your vehicle more quickly. Recirculation mode can
be used with vent and bi-level modes, but it
cannot be used with floor, defog or defrost modes.
Defog and defrost modes are described later in
this section.
If recirculation mode is selected with floor,
defog, or defrost modes, the indicator will flash
three times and then turn off indicating the
selection is not available.
You may also notice that the air conditioning
compressor will run while in recirculation mode.
This is normal and will help to prevent fogging.