climate control GMC YUKON 2011 Owner's Guide

Black plate (3,1)GMC Yukon/Yukon XL Owner Manual - 2011
Climate Controls 8-3
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 Climate Control System (Rear
Climate Control Only) on page 8‑10
or Rear Climate Control System
(Rear Climate with Rear Seat Audio)
on page 8‑11 for more information.
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.

Black plate (4,1)GMC Yukon/Yukon XL Owner Manual - 2011
8-4 Climate Controls
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 the vehicle is a hybrid, see the hybrid supplement for more information.
A. Fan Control
B. AUTO (Automatic Operation)
C. Defrost
D. Recirculation
E. REAR (Rear Climate Control)F. Air Delivery Mode Control
G. Driver Temperature Control
H. Display
I. Power Button
J. Rear Window DefoggerK. Air Conditioning
L. PASS
M. Passenger Temperature Control
O(On/Off):
Press to turn the
climate control system on or off.
Outside air still enters the vehicle,
and is directed to the floor. This
direction can be changed by
pressing the mode button.
Recirculation can be selected once
you have selected vent or bi-level
mode. The temperature can also be
adjusted using either temperature
button. If the air delivery mode or
temperature settings are adjusted
with the system off, the display
illuminates briefly to show the
settings and then returns to off. The
system can be turned back on by
pressing either
O,D,C,#, the
defrost or the AUTO button.

Black plate (5,1)GMC Yukon/Yukon XL Owner Manual - 2011
Climate Controls 8-5
Driver and Passenger Side
Temperature Control
The driver and passenger side
temperature buttons are used to
adjust the temperature of the air
coming through the system on the
driver or passenger side of the
vehicle. The temperature can be
adjusted even if the system is
turned off. This is possible since
outside air always flows through
the system as the vehicle is
moving forward unless it is
set to recirculation mode. See
“Recirculation”later in this section.
Press the + or −buttons to increase
or decrease the cabin temperature.
The driver side or passenger side
temperature display shows the
temperature setting decreasing or
increasing.
The passenger temperature
setting can be set to match the
driver temperature setting by
pressing the PASS button and
turning off the PASS indicator. When the passenger temperature
setting is set different than the driver
setting, the indicator on the PASS
button illuminates and both the
driver side and passenger side
temperature displays are shown.
When in defrost mode the
passenger temperature setting
cannot be changed.
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 and passenger 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 or
passenger 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.

Black plate (6,1)GMC Yukon/Yukon XL Owner Manual - 2011
8-6 Climate Controls
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.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.

Black plate (7,1)GMC Yukon/Yukon XL Owner Manual - 2011
Climate Controls 8-7
-(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.
#(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.

Black plate (8,1)GMC Yukon/Yukon XL Owner Manual - 2011
8-8 Climate Controls
@(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 Climate
Control System (Rear Climate
Control Only) on page 8‑10 orRear
Climate Control System (Rear
Climate with Rear Seat Audio) on
page 8‑11.
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. It 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.
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.
Heated Mirrors: Press
clear fog or frost from the surface
of the outside mirror. See Power
Mirrors on page 2‑18.

Black plate (9,1)GMC Yukon/Yukon XL Owner Manual - 2011
Climate Controls 8-9
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 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.

Black plate (10,1)GMC Yukon/Yukon XL Owner Manual - 2011
8-10 Climate Controls
Rear Climate Control System (Rear Climate
Control Only)
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 Systems on
page 8‑1 orDual Automatic Climate
Control System on page 8‑4. 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.

Black plate (11,1)GMC Yukon/Yukon XL Owner Manual - 2011
Climate Controls 8-11
)(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.
Rear Climate Control System (Rear Climate with Rear
Seat Audio)
For vehicles with the rear heat and air conditioning controls, they are
integrated with the rear seat audio controls located in the center console.
The system can be controlled from the front controls as well as the rear
controls.
Rear Climate Control with Rear Seat Audio Controls
A. Fan Control
B. Air Delivery Mode Control
C. Temperature 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.

Black plate (12,1)GMC Yukon/Yukon XL Owner Manual - 2011
8-12 Climate Controls
The rear climate control system can
also be turned off by pressing and
holding the
Cbutton. To turn the
system on from the rear seats,
press any rear climate control
button, except the
Cbutton.
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.
To turn the system on from the
rear, press any rear climate control
button, except the
Cbutton.
Automatic Operation, If
Equipped
AUTO: Press the air delivery
mode button until this setting is
selected to control the inside
temperature, air delivery, and fan
speed. AUTO appears in the display
when automatic operation is active.
+/−(Increase/Decrease
Temperature): Press the +
or −buttons to increase or
decrease the cabin temperature.
The rear control temperature
display will show the temperature
setting increasing or decreasing.
The display only indicates climate
control functions when the system is
in rear independent mode.
Manual Operation
D C(Fan Control): Press these
buttons on the rear seat audio
control panel to increase or
decrease the airflow. Pressing
the fan up button when the system
is off will turn the system on. The air
delivery mode will remain under
automatic control.
+/−(Temperature Control):
Press these buttons to adjust
the temperature of the air flowing
into the passenger area. Press
the + button for warmer air and
press the −button for cooler air.
N(Air Delivery Mode Control):
Press the mode button to change
the direction of the airflow in the
vehicle. Repeatedly press the
button until the desired mode
appears on the display. Multiple
presses will cycle through the
delivery selections.