GMC 2008 Acadia - Manual (Page 174)

The air delivery mode setting remains displayed,
the word AUTO is no longer displayed, and the
AUTO button indicator light turns off.
H
(Vent): This setting delivers air to the instrument
panel outlets.
)
(Bi-Level): This mode directs air 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): This mode directs most of the air to
the floor outlets, with some of the air directed to the
windshield, side window outlets, and second row
floor outlets. In this mode, the system automatically
selects outside air. Recirculation cannot be selected
in floor mode.
-
(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 your vehicle. Recirculation also
helps to quickly cool the warmer air inside your vehicle.
The recirculation mode cannot be used with floor, defrost,
or defogging modes. If you try to select recirculation in
one of those modes, the indicator flashes three times and
turns off. The air conditioning compressor also comes on
when this mode is activated. While in recirculation mode
the windows may fog when the weather is cold and damp.
To clear the fog, select either the defog or defrost mode
and increase the fan speed.
Press the button again to turn off the recirculation mode.
It automatically turns off when the engine is turned off and
must be re-selected when the engine is turned on again.
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