2010 GMC YUKON air condition

Climate Controls
Climate Control System
The heating, cooling, and ventilation in the vehicle can
be controlled with this system.
A. Fan Control
B. REAR
C. Recirculation
D. Air Delivery Mode Control E. Air Conditioning
F. Driver and Passenger Temperature Controls
G. Rear Window Defogger Temperature Control:
Move the thumbwheels up or
down to increase or decrease the temperature on the
driver's side or the passenger side of the vehicle for the
dual zone system.
9(Fan Control): Turn the left knob clockwise or
counterclockwise to increase or decrease the fan
speed. Turn the knob all the way counterclockwise
to turn the front system off.
Air Delivery Mode Control: Turn clockwise or
counterclockwise to change the airflow direction inside
the vehicle. By positioning the knob between two
modes, a combination of those modes is selected.
Select from the following modes:
H(Vent): Air is directed to the instrument panel
outlets.
)(Bi-Level): Air is divided between the instrument
panel and floor 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 floor
outlets.
6(Floor): Air is directed to the floor outlets, with
some of the air directed to the windshield, side window,
and second row floor outlets. In this mode, the system
automatically selects outside air. Recirculation cannot
be selected when in Floor Mode.
4-18

-(Defog):The defog mode is used to clear the
windows of fog or moisture. Air is directed to the
windshield, floor outlets, and side window vents. In this
mode, the system turns off recirculation and runs the air
conditioning compressor unless the outside temperature
is close to freezing. The recirculation mode cannot be
selected while in the defog mode.
0(Defrost): The defrost mode is used to remove fog
or frost from the windshield more quickly. Air is directed
to the windshield and side window vents, with some
directed to the floor vents. In this mode, the system
automatically forces outside air into the vehicle.
The recirculation mode cannot be selected while in
the defrost mode. The air conditioning compressor
runs automatically in this setting, unless the outside
temperature is close to freezing.
Do not drive the vehicle until all the windows are clear.
#(Air Conditioning): Press this button to turn the
air conditioning system on or off. An indicator light
comes on to show that the air conditioning is on.
The air conditioning can be selected in any mode
as long as the fan switch is on.
On hot days, open the windows to let hot inside air
escape; then close them. This helps to reduce the time
it takes for the vehicle to cool down. It also helps the
system to operate more efficiently. 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.
h(Recirculation):
Press this button to turn the
recirculation mode on or off. An indicator light comes
on to show that recirculation is on.
This mode recirculates and helps to quickly cool the
air inside the vehicle. It can be used to help prevent
outside air and odors from entering the vehicle.
The recirculation mode cannot be used with floor,
defrost, or defogging modes. If recirculation is selected
while in one of those modes, the indicator flashes three
times and turns off. The air conditioning compressor
will also come 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.
The recirculation mode can also be turned off by turning
off the engine.
REAR: Press to turn the rear heating and air
conditioning on. See Rear Air Conditioning and Heating
System
on page 4‑27or Rear Air Conditioning and
Heating System and Electronic Climate Controlson
page 4‑28for more information.
4-19

Rear Window Defogger
The rear window defogger uses a warming grid to
remove fog from the rear window.
<(Rear Window Defogger):Press this button to
turn the rear window defogger on or off. The system
automatically turns off several minutes after it has been
activated. The defogger can also be turned off by
turning off the engine. Do not drive the vehicle until
all the windows are clear.
For vehicles with heated outside rearview mirrors,
the mirrors will heat to help clear fog or frost from the
surface of the mirror when the rear window defog button
is pressed.
Notice: Do not use anything 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.
Dual Automatic Climate Control
System
The heating, cooling, and ventilation in the vehicle can
be controlled with this system. The vehicle also has a
flow-through ventilation system described later in this
section. If this vehicle is a Two-mode Hybrid, see the Two-mode
Hybrid manual for more information.
A. Fan Control
B. AUTO
C. Defrost
D. Recirculation
E. REAR F. Air Delivery Mode Control
G. Driver Temperature Control H. Display
I. Power Button
J. Rear Window Defogger
K. Air Conditioning L. PASS
M. Passenger Temperature Control
4-20

Automatic Operation
AUTO (Automatic):When automatic operation is active
the system will control the inside temperature, the air
delivery, and the fan speed.
Use the steps below to place the entire system in
automatic mode:
1. Press the AUTO button. When AUTO is selected, the display will change to
show the current temperature(s) and AUTO will be
lit on the display. The current delivery mode and
fan speed will also be displayed for approximately
5 seconds.
When AUTO is selected, the air conditioning
operation and air inlet will be automatically
controlled. The air conditioning compressor
will run when the outside temperature is over
about 4°C (40°F). The air inlet will normally be
set to outside air. If it is hot outside, the air inlet
may automatically switch to recirculate inside air
to help quickly cool down the vehicle. The light on
the button comes on in recirculation. 2. Set the driver's and passenger's temperature.
To find your comfort setting, start with a 23°C
(74°F) temperature setting and allow about
20 minutes for the system to regulate. Use the
driver's or passenger's temperature buttons to
adjust the temperature setting as necessary. If a
temperature setting of 15°C (60°F) is chosen, the
system remains at the maximum cooling setting.
If a temperature setting of 32°C (90°F) is chosen,
the system remains at the maximum heat setting.
Choosing either maximum setting will not cause
the vehicle to heat or cool any faster.
Do not to cover the solar sensor located on the top of
the instrument panel near the windshield. This sensor
regulates air temperature based on sun load and also
turns on the headlamps. For more information on the
solar sensor, see “Sensors”later in this section.
To avoid blowing cold air in cold weather, the system
will delay turning on the fan until warm air is available.
The length of delay depends on the engine coolant
temperature. Pressing the fan switch will override this
delay and change the fan to a selected speed.
4-22

Manual Operation
D C(Fan Control):Press these buttons to increase or
decrease the fan speed.
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.
H G(Air Delivery Mode Control): Press these buttons
to change the 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.
H(Vent): Air is directed to the instrument panel
outlets.
)(Bi-Level): Air is divided between the instrument
panel and floor outlets. Some air is directed towards the
windshield and side window 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 automatically
selects outside air.
-(Defog): This mode clears the windows of fog or
moisture. Air is directed to the windshield, floor outlets,
and side window vents. In this mode, the system
turns off recirculation and runs the air conditioning
compressor unless the outside temperature is close
to freezing. The recirculation mode cannot be selected
while in the defog mode.
0(Defrost): This mode removes fog or frost from
the windshield more quickly. Air is directed to the
windshield and side window vents, with some
directed to the floor vents. In this mode, the system
automatically forces outside air into the vehicle and
runs the air conditioning compressor unless the outside
temperature is close to freezing. The recirculation mode
cannot be selected while in the defrost mode.
The passenger temperature control cannot be activated
while in defrost mode. If the PASS button is pressed,
the button indicator flashes three times and will not
work. If the passenger temperature buttons are
adjusted, the driver temperature indicator changes.
The passenger temperature will not be displayed.
If vent, bi-level, or floor mode is selected again,
the climate control system displays the previous
temperature settings.
Do not drive the vehicle until all the windows are clear.
4-23

#(Air Conditioning):Press to turn the air
conditioning (A/C) compressor on and off. An indicator
light comes on to show that the air conditioning is on.
If this button is pressed when the air conditioning
compressor is unavailable, the indicator flashes three
times and then turns off. If the air conditioning is on
and the outside temperature drops below a temperature
which is too cool for air conditioning to be effective,
the air conditioning light turns off to show that the air
conditioning mode has been canceled.
On hot days, open the windows long enough to let hot
inside air escape. This helps to reduce the time it takes
for the vehicle to cool down. It also helps the system to
operate more efficiently.
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 to show that
the recirculation is on.
This mode recirculates and helps to quickly cool the
air inside the vehicle. It can be used to help prevent
outside air and odors from entering the vehicle.
The recirculation mode cannot be used with floor, defog,
or defrost modes. If recirculation is selected with one
of those modes, the indicator light flashes three times
and then 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.
The recirculation mode can also be turned off by turning
off the ignition.
REAR: For vehicles with the rear heat and air
conditioning controls. Press to turn the rear climate
control system on or off. See Rear Air Conditioning and
Heating System and Electronic Climate Controls
on
page 4‑28.
4-24

The interior temperature sensors located in the
headliner above the driver side seat and if equipped, in
the headliner above the second row seats measure 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 your comfort setting by
adjusting the outlet 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 air outlets located in the center and on the side
of the instrument panel to direct the airflow.
Operation Tips
.Keep the hood and front air inlets free of ice,
snow, or any other obstruction (such as leaves).
The heater and defroster will work far better,
reducing the chance of fogging the inside of the
windows.
.When you enter a vehicle in cold weather, press
the fan up button to the maximum fan level before
driving. This helps clear the intake ducts of snow
and moisture, and reduces the chance of fogging
the inside of the window.
.Keep the air path under the front seats clear of
objects. This helps air to circulate throughout the
vehicle.
.Adding outside equipment to the front of the
vehicle, such as hood-air deflectors, may affect the
performance of the heating and air conditioning
system. Check with your dealer before adding
equipment to the outside of the vehicle.
4-26

Rear Air Conditioning and Heating
System
For vehicles with this system, the rear controls are three
knobs located in the headliner. The system can also be
controlled with the front controls.
A. Fan Control
B. Temperature Control
C. Air Delivery Mode Control
REAR: Press the REAR button on the front climate
control system to turn the rear climate control system on
or off. An indicator comes on when the rear system is
on. See Climate Control System
on page 4‑18orDual Automatic Climate Control System
on page 4‑20.
The rear system can also be turned off by turning the
rear fan knob to the
9position.
Mimic Mode: This mode matches the rear climate
control to the front climate control airflow settings.
It comes on when REAR is pressed the first time.
Independent Mode: This mode directs rear seating
airflow according to the settings of the rear controls.
It comes on when any rear control is adjusted.
Temperature Control: Turn clockwise or
counterclockwise to increase or decrease the
airflow temperature into the passenger area.
Fan Control: Turn clockwise or counterclockwise to
increase or decrease the fan speed.
Air Delivery Mode Control: Turn clockwise or
counterclockwise to change the direction of the airflow.
H (Vent): Air is directed through the headliner outlets.
) (Bi-Level): Air is directed through the floor and
headliner outlets. The rear system floor outlets
are located directly behind the second row seats.
The flow can be divided between vent and floor outlets
depending upon where the knob is placed between the
settings.
6 (Floor): Air is directed to the floor outlets. The rear
system floor outlets are located directly behind the
second row seats.
4-27