2009 GMC ACADIA air condition

outlets. In this mode, the system
automatically selects outside
air. Recirculation cannot be selected
while in oor mode.
-(Defog):This mode clears
the windows of fog or moisture.
Air is directed to the windshield,
oor outlets, and side window vents.
When this mode is selected, the
system turns off recirculation
and runs the air conditioning unless
the outside temperature is less
than 40°F (4°C). Recirculation
cannot be selected while in the
defog mode. Do not drive the vehicle
until all the windows are clear.
0(Defrost):This mode quickly
clears the windshield of fog or frost.
Air is directed to the windshield
and side window vents, with some
to the oor vents. In this mode,
outside air is pulled inside the
vehicle. Recirculation cannot be
selected while in the defrost mode.
The air conditioning system runsautomatically in this setting, unless
the outside temperature is less
than 40°F (4°C). Do not drive the
vehicle until all the windows
are clear.
#(Air Conditioning):Press to
turn the air conditioning system on
or off. An indicator light comes
on when A/C is on. The air
conditioning system does not
operate when the outside
temperature is below 40°F (4°C).
The indicator light ashes three
times and turns off when outside
conditions affect air conditioning
operation. This is normal.
For quicker cool down on hot days:
1. Open the windows to let hot
air escape.
2. Select
Hmode.
3. Select
#.
4. Select the coolest temperature.
5. Select the highest fan speed.6. Close the windows after the
hot air has escaped.
7. Once the vehicle’s interior
temperature is below the outside
temperature, select
@mode
for faster cooling.
Using recirculation for long periods
of time could cause the air inside
of the vehicle to become too dry.
To prevent this from happening,
after the inside of the vehicle
has cooled, turn the recirculation
mode off.
The air conditioning system removes
moisture from the air, so a small
amount of water might drip under the
vehicle while idling or after turning off
the engine. This is normal.
@(Recirculation):Press to turn
the recirculation mode on or off.
An indicator light comes on when
recirculation is on. When the engine
is turned off, the recirculation mode
automatically turns off and must
be re-selected when the engine is
turned on again.
Instrument Panel 3-23

This mode recirculates and helps to
quickly cool the air inside the
vehicle. It can be used to prevent
outside air and odors from entering
the vehicle.
The recirculation mode cannot be
used with oor, defrost, or defogging
modes. If recirculation is selected
in these modes, the indicator ashes
three times and turns off. The air
conditioning also comes on when
this mode is activated unless
the outside air temperature is
less than 40°F (4°C). While in
recirculation mode the windows can
fog when the weather is cold and
damp. To clear the fog, select either
the defog or defrost mode and
increase the fan speed.Rear Window Defogger
The rear window defogger uses a
warming grid to remove fog from the
rear window.
<(Rear Window Defogger):
Press to turn the rear window
defogger on or off. The rear
window defogger stays on for about
10 minutes, before automatically
turning off. The defogger will
also turn off when the engine is
turned off.
Do not drive the vehicle until all the
windows are clear.
For vehicles with heated outside
rearview mirrors, fog or frost
is cleared from the surface of the
mirror when
sharp on the inside of the rear
window. If you do, you could cut
or damage the warming grid, and
the repairs would not be covered
by the vehicle warranty. Do not
attach a temporary vehicle
license, tape, a decal or anything
similar to the defogger grid.
REAR:Press to turn the rear
heating and air conditioning on or
off. SeeRear Air Conditioning
and Heating System on page 3-31
orRear Air Conditioning and
Heating System and Electronic
Climate Controls on page 3-32.
3-24 Instrument Panel

Dual Automatic Climate Control System
The heating, cooling, and ventilation in the vehicle can be controlled with this
system.
A. Fan Control
B. AUTO
C. Defrost
D. Recirculation
E. REAR
F. Air Delivery Mode Control
G. Driver Side Temperature ControlH. Display
I. Power
J. Rear Window Defogger
K. Air Conditioning
L. PASS (Passenger)
M. Passenger Side Temperature
Control Display Function
Each time the temperature, mode,
or fan control buttons are pressed,
the climate control display shows
that function along with the
inside temperature setting.
The outside temperature is
displayed on the instrument
panel cluster.
O(On/Off):
Press to turn the
climate control system on or
off. While the system is off, outside
air still enters through the oor
outlets, but the air delivery mode
can be adjusted.
The climate control system will also
turn on if either the fan control,
defrost, AUTO, or air conditioning
buttons are pressed.
Instrument Panel 3-25

Automatic Operation
AUTO (Automatic):The system
automatically controls the inside
temperature, the air delivery,
and the fan speed.
To use automatic mode:
1. Press the AUTO button.
When AUTO is selected, the
current temperature(s) selected
and AUTO is shown on the
display. The current air delivery
mode and fan speed also appear
for approximately ve seconds.
When AUTO is selected, the air
conditioning and air inlet are
automatically controlled. The air
conditioning runs when the
outside temperature is over
40°F (4°C). The system is
automatically set to outside air,
unless it is hot outside and
then the air inlet changes to
recirculation mode to help quickly
cool the vehicle. The recirculation
indicator light will come on.2. Set the temperature for the driver
and passenger.
To nd a comfortable setting,
start with a 73°F (22°C)
temperature setting and allow
about 20 minutes for the system
to regulate. Use the driver’s
side or passenger side
temperature buttons to adjust
the temperature setting as
necessary. The system will
remain at the selected setting.
Choosing the warmest or coolest
temperatures will not cause
the vehicle to heat or cool
any faster.
To avoid blowing cold air in cold
weather, the system delays
turning on the fan until warm air
is available. Press the fan
control to override this delay and
select the fan speed.Temperature Control
The driver and passenger side
temperature buttons are used to
adjust the temperature of the
air coming through the system.
The temperature can be adjusted
even if the system is turned off since
outside air still enters the vehicle,
unless the recirculation mode
is selected. See “Recirculation” later
in this section.
Driver Side Temperature Control:
Press the + or−buttons to
increase or decrease the driver side
temperature. The driver’s side
temperature display will show the
temperature setting.
Passenger Side Temperature
Control:Press the + or−buttons
to increase or decrease the
passenger side temperature.
The passenger side display will
show the temperature setting.
PASS (Passenger):Press to set
the passenger temperature to match
the driver temperature setting.
3-26 Instrument Panel

The PASS indicator will turn off.
When the passenger temperature
setting is different than the
driver setting, the PASS indicator
comes on.
Manual Operation
The air delivery mode or fan speed
can be manually adjusted.
D/C(Fan Control):Press to
increase or decrease the fan speed.
Pressing
DorCwhile in automatic
control places the fan speed
under manual control.
The air delivery mode remains in
automatic control. The fan setting still
displays, but the word AUTO
no longer displays, and the AUTO
button indicator light turns off.
H/G(Air Delivery Mode Control):
Press to change the direction of
the airow in the vehicle. Repeatedly
press
HorGuntil the desired
mode appears on the display.Pressing a mode button while the
system is off changes the air
delivery mode without turning the
system on. Press a mode button
while in automatic control to place
the system into manual control.
The air delivery mode setting still
displays, but the word AUTO
no longer displays, and the AUTO
button indicator light turns off.
H(Vent):Air is directed to the
instrument panel outlets.
)(Bi-Level):Air is divided
between the instrument panel and
oor outlets. Some air is directed
towards the windshield and
side window outlets. Cooler air is
directed to the upper outlets
and warmer air to the oor outlets.
6(Floor):Air is directed to
the oor outlets, with some of the
air directed to the windshield,
side window, and second row oor
outlets. In this mode, the system
uses outside air.
-(Defog):This mode clears
the windows of fog or moisture.
Air is directed to the windshield,
oor outlets, and side window vents.
When this mode is selected, the
system turns off recirculation
and runs the air conditioning
compressor unless the outside
temperature is less than 40°F (4°C).
Do not drive the vehicle until all
the windows are clear.
0(Defrost):Press to turn the
defrost on or off. This mode quickly
clears the windshield of fog or frost.
Air is directed to the windshield, side
window, and oor vents. In this
mode, outside air is pulled inside the
vehicle. The air conditioning system
runs automatically in this setting,
unless the outside temperature is
less than 40°F (4°C).
Do not drive the vehicle until all the
windows are clear.
Instrument Panel 3-27

While in defrost mode, if the PASS
button is pressed, the PASS button
indicator ashes three times to show
that the passenger climate control
system cannot be activated. If the
passenger temperature buttons are
adjusted while in defrost mode, the
driver temperature indicator will
change. The passenger temperature
will not be displayed.
@(Recirculation):Press to turn
the recirculation mode on or off.
An indicator light comes on
when recirculation is on. When the
engine is turned off, the recirculation
mode automatically turns off and
must be re-selected when the
engine is turned on again.
This mode recirculates and helps to
quickly cool the air inside the vehicle.
It can be used to prevent outside air
and odors from entering the vehicle.
The recirculation mode cannot be
used with oor, defog, or defrosting
modes. If recirculation is selected in
these modes, the indicator ashesthree times and turns off. The air
conditioning compressor also comes
on when this mode is activated.
While in recirculation mode the
windows can fog when the weather
is cold and damp. To clear the fog,
select either the defog or defrost
mode and increase the fan speed.
Air Conditioning
#(Air Conditioning):Press to
turn the air conditioning (A/C)
on and off. An indicator light comes
on when A/C is on.
The A/C does not work when the
outside temperature is below
40°F (4°C). If
#is pressed the
indicator ashes three times
and turns off to show that the
A/C mode is not available. If the
A/C is on and the outside
temperature drops below a
temperature which is too cool for
air conditioning to be effective,
the A/C indicator turns off to show
that the A/C mode has been
canceled.On hot days, open the windows
briey to let hot inside air escape.
This helps reduce the time it
takes for the interior of the vehicle
to cool down.
The air conditioning system removes
moisture from the air, so a small
amount of water might drip under the
vehicle while idling or after turning off
the engine. This is normal.
Rear Window Defogger
The rear window defogger uses a
warming grid to remove fog from the
rear window.
<(Rear Window Defogger):
Press to turn the rear window
defogger on or off. The rear window
defogger stays on for about
10 minutes, before turning off.
The defogger also turns off when
the engine is turned off. Do not drive
the vehicle until all the windows
are clear.
3-28 Instrument Panel

For vehicles with heated outside
rearview mirrors, fog or frost
is cleared from the surface of the
mirror when the rear window
defog button is pressed.
Notice:Do not use a razor blade
or sharp object to clear the
inside rear window. Do not adhere
anything to the defogger grid
lines in the rear glass. These
actions may damage the rear
defogger. Repairs would not be
covered by your warranty.
REAR:Press to turn the rear
heating and air conditioning on or
off. SeeRear Air Conditioning
and Heating System on page 3-31
orRear Air Conditioning and
Heating System and Electronic
Climate Controls on page 3-32.Sensors
The solar sensor, located in the
defrost grille in the middle of
the instrument panel, monitors the
solar heat. Do not cover the
solar sensor or the system will not
work properly.The interior temperature sensor
located on the instrument panel to
the right of the steering column,
measures the temperature of the air
inside the vehicle.
There is also an exterior temperature
sensor located behind the front grille.
This sensor reads the outside air
temperature and helps maintain the
temperature inside the vehicle. Any
cover on the front of the vehicle
could cause a false reading in the
displayed temperature.
The climate control system uses the
information from these sensors to
maintain comfort settings by
Instrument Panel 3-29

adjusting the temperature, fan
speed, and the air delivery mode.
The system may also supply cooler
air to the side of the vehicle
facing the sun. The recirculation
mode will also be used as needed
to maintain cool outlet temperatures.
Outlet Adjustment
Use the slider switch in the center
of the outlet, to change the direction
of the air ow. Use the thumbwheel
near the outlet to control the
amount of air ow or to shut off the
airow completely.
Keep all outlets open whenever
possible for best system
performance.
Operation Tips

Clear away any ice, snow, or
leaves from the air inlets at
the base of the windshield that
can block the ow of air into
the vehicle.
Use of non-GM approved hood
deectors can adversely affect
the performance of the system.
Keep the path under all seats
clear of objects to help circulate
the air inside the vehicle
more effectively.
If fogging reoccurs while in vent
or bi-level modes with mild
temperature throughout the
vehicle, turn on the air conditioner
to reduce windshield fogging.
3-30 Instrument Panel