cooling GMC YUKON 2010 Owner's Manual

Climate Controls
The heating, cooling, and ventilation in the vehicle can
be controlled with these systems.
If this vehicle is a Two-mode Hybrid, see the Two-mode
Hybrid manual for more information.
A. Fan Control
B. REAR
C. Air Recirculation
D. Air Delivery Mode Control E. Air Conditioning
F. Driver and Passenger Temperature Controls
G. Rear Window Defogger
A. Fan Control
B. AUTO
C. Defrost
D. Air 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
See Climate Control System
on page 4‑18andDual
Automatic Climate Control Systemon page 4‑20.
For vehicles with rear heating and air conditioning
1-18

Heated and Cooled Seats
If the front seats have the heated and cooled seat
feature, the buttons used to control this feature are
located on the front doors near the door handle.
{(Cooled Seat):To cool the entire seat, press the
button with the cooled seat symbol.
This symbol will appear on the climate control display to
indicate that the feature is on. Press the button to cycle
through the temperature settings of high, medium, and
low and to turn the cooled seat off. Indicator bars next
to the symbol designate the level of cooling selected:
three for high, two for medium, and one for low.
+(Heated Seatback): To heat only the seatback,
press the button with the heated seatback symbol.
This symbol will appear on the climate control display to
indicate that the feature is on. Press the button to cycle
through the temperature settings of high, medium, and
low and to turn the heated seatback off. Indicator bars
next to the symbol designate the level of heat selected:
three for high, two for medium, and one for low.
z(Heated Seat and Seatback): To heat the entire
seat, press the button with the heated seat and
seatback symbol.
This symbol will appear on the climate control display to
indicate that the feature is on. Press the button to cycle
through the temperature settings of high, medium, and
low and to turn the heated seat off. Indicator bars next
to the symbol designate the level of heat selected: three
for high, two for medium, and one for low.
The heated and cooled seats will be canceled after the
ignition is turned off. To use the heated and cooled seat
feature after the vehicle is started, you will need to
press the appropriate seat button again.
2-9

Remote Vehicle Start
Your vehicle may have a remote starting feature.
This feature allows you to start the engine from outside
of the vehicle. It may also start up the vehicle's heating
or air conditioning systems and rear window defogger.
Normal operation of the system will return after the key
is turned to the ON/RUN position.
If your vehicle has an automatic climate control system,
the climate control system will default to a heating or
cooling mode depending on the outside temperatures.
If your vehicle does not have an automatic climate
control system, the system will turn on at the setting the
vehicle was set to when the vehicle was last turned off.
During a remote start, if your vehicle has an automatic
climate control system and heated seats, the heated
seats will turn on during colder outside temperatures
and will shut off when the key is turned to ON/RUN.If your vehicle does not have an automatic climate
control system, during remote start, you will need to
manually turn the heated seats on and off. See
Heated
Seats
on page 2‑8for additional information.
Laws in some communities may restrict the use of
remote starters. For example, some laws may require
a person using the remote start to have the vehicle in
view when doing so. Check local regulations for any
requirements on remote starting of vehicles.
Do not use the remote start feature if your vehicle is low
on fuel. Your vehicle may run out of fuel.
If your vehicle has the remote start feature, the RKE
transmitter functions will have an increased range of
operation. However, the range may be less while the
vehicle is running.
There are other conditions which can affect the
performance of the transmitter, see Remote Keyless
Entry (RKE) System
on page 3‑4for additional
information.
3-8

Liftgate/Liftglass
{WARNING:
It can be dangerous to drive with the liftglass or
liftgate open because carbon monoxide (CO) gas
can come into your vehicle. You cannot see or
smell CO. It can cause unconsciousness and
even death.
If you must drive with the liftglass or liftgate open,
or if electrical wiring or other cable connections
must pass through the seal between the body and
the liftglass or liftgate:
.Make sure all other windows are shut.
.Turn the fan on your heating or cooling
system to its highest speed with the
recirculation mode off. That will force outside
air into your vehicle. SeeClimate Control
System
on page 4‑18or Dual Automatic
Climate Control System on page 4‑20.
(Continued)
WARNING: (Continued)
.If you have air outlets on or under the
instrument panel, open them all the way.
.If your vehicle has a power liftgate, disable the
power liftgate function.
See Engine Exhaust on page 3‑52.
If your vehicle has a power liftgate, see Power Liftgate
on page 3‑15.
To unlock the liftgate, use the power door lock switch or
press the door unlock button on the Remote Keyless
Entry (RKE) transmitter twice. See Remote Keyless
Entry (RKE) System Operation
on page 3‑5.
3-13

Entry Lighting
The vehicle has an illuminated entry feature.
When the doors are opened, the dome lamps will
come on if the dome override button is in the extended
position. If the dome override button is pressed in, the
lamps will not come on.
Exit Lighting
The interior lamps come on when the key is removed
from the ignition. They turn off automatically in
20 seconds. The lights do not come on if the dome
override button is pressed in.
Reading Lamps
For vehicles with reading lamps they are located on the
overhead console.
To turn on the reading lamps, press the button located
next to each lamp. To turn them off, press the button
again.
The vehicle may also have reading lamps in other
locations. To turn the lamps on or off, press the button
located next to the lamp.
The lamps are fixed and cannot be adjusted.
Electric Power Management
The vehicle has Electric Power Management (EPM) that
estimates the battery's temperature and state of charge.
It then adjusts the voltage for best performance and
extended life of the battery.
When the battery's state of charge is low, the voltage
is raised slightly to quickly bring the charge back up.
When the state of charge is high, the voltage is lowered
slightly to prevent overcharging. If the vehicle has a
voltmeter gauge or a voltage display on the Driver
Information Center (DIC), you may see the voltage
move up or down. This is normal. If there is a problem,
an alert will be displayed.
The battery can be discharged at idle if the electrical
loads are very high. This is true for all vehicles. This is
because the generator (alternator) may not be spinning
fast enough at idle to produce all the power that is
needed for very high electrical loads.
A high electrical load occurs when several of the
following are on, such as: headlamps, high beams, fog
lamps, rear window defogger, climate control fan at high
speed, heated seats, engine cooling fans, trailer loads,
and loads plugged into accessory power outlets.
4-15

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

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

StabiliTrak®Indicator Light
For vehicles with the
StabiliTrak®system, this
light comes on briefly
while starting the engine.
If it does not, have the vehicle serviced by your dealer.
If the system is working normally the indicator light then
goes off.
If the light comes on and stays on while driving, there
could be a problem with the StabiliTrak
®system and the
vehicle might need service. When this warning light is
on, the StabiliTrak
®system is off and does not limit
wheel spin.
The light flashes if the system is active and is working
to assist the driver with directional control of the vehicle
in difficult driving conditions.
See StabiliTrak
®Systemon page 5‑6for more
information.
Engine Coolant Temperature Gauge
United StatesCanada
This gauge shows the engine coolant temperature.
It also provides an indicator of how hard the vehicle is
working. During a majority of the operation, the gauge
reads 210°F (100°C) or less. If you are pulling a load
or going up hills, it is normal for the temperature to
fluctuate and approach the 250°F (122°C) mark. If the
gauge reaches the 260°F (125°C) mark, it indicates that
the cooling system is working beyond its capacity.
See Engine Overheating on page 6‑36.
If the vehicle is a Two-mode Hybrid, see the Two-mode
Hybrid manual for more information.
4-38

ENGINE OVERHEATED IDLE ENGINE
Notice:If you drive your vehicle while the engine is
overheating, severe engine damage may occur. If an
overheat warning appears on the instrument panel
cluster and/or DIC, stop the vehicle as soon as
possible. See Engine Overheating
on page 6‑36for
more information.
This message displays when the engine coolant
temperature is too hot. Stop and allow the vehicle
to idle until it cools down. See Engine Coolant
Temperature Gauge on page 4‑38.
See Overheated Engine Protection Operating Mode
on
page 6‑39for information on driving to a safe place in
an emergency.
ENGINE OVERHEATED STOP ENGINE
Notice: If you drive your vehicle while the engine is
overheating, severe engine damage may occur. If an
overheat warning appears on the instrument panel
cluster and/or DIC, stop the vehicle as soon as
possible. See Engine Overheating
on page 6‑36for
more information.
This message displays and a chime sounds if the
engine cooling system reaches unsafe temperatures for
operation. Stop and turn off the vehicle as soon as it is
safe to do so to avoid severe damage. This message
clears when the engine has cooled to a safe operating
temperature.
ENGINE POWER IS REDUCED
This message displays and a chime sounds when the
cooling system temperature gets too hot and the engine
further enters the engine coolant protection mode.
See Engine Overheating
on page 6‑36for further
information.
This message also displays when the vehicle's engine
power is reduced. Reduced engine power can affect the
vehicle's ability to accelerate. If this message is on, but
there is no reduction in performance, proceed to your
destination. The performance may be reduced the next
time the vehicle is driven. The vehicle may be driven
at a reduced speed while this message is on, but
acceleration and speed may be reduced. Anytime this
message stays on, the vehicle should be taken to your
dealer for service as soon as possible.
FUEL LEVEL LOW
This message displays and a chime sounds if the fuel
level is low. Refuel as soon as possible. See Fuel
Gauge
on page 4‑46and Fuelon page 6‑6for
more information.
HOOD OPEN
This message displays and a chime sounds if the hood
is not fully closed. Stop and turn off the vehicle, check
the hood for obstructions, and close the hood again.
Check to see if the message still appears on the DIC.
4-63