2015 GMC YUKON DENALI ECO mode

Black plate (51,1)GMC 2015i Yukon Denali/Yukon XL Denali Owner Manual (GMNA-
Localizing-U.S./Canada/Mexico-8431504) - 2015 - CRC - 7/30/14
Instruments and Controls 5-51
Language (Language)
Select Language, then select from
the available language(s).
The selected language will display
on the system, and voice
recognition (if equipped) will reflect
the selected language.
Valet Mode (If Equipped)
This will lock the infotainment
system and steering wheel controls.
It may also limit top speed, power,
and access to vehicle storage
locations (if equipped).
To enable valet mode:
1. Enter a four-digit code on thekeypad.
2. Press Enter to go to the confirmation screen.
3. Re-enter the four-digit code.
Press LOCK or UNLOCK to lock or
unlock the system. Press Back to go
back to the previous menu.
Teen Driver (If Equipped)
Press and the following may
display:
.View Report Card
.Manage Settings
.Change PIN
.Key Registration
.Clear All Teen Keys/PIN
View Report Card
This allows the driver ’s driving
habits to be viewed. See “Teen
Driver” in“Settings” in the
infotainment manual.
Manage Settings
Press and the following may
display:
.Audio Volume Limit
.Teen Driver Speed Limiter
.Teen Driver Speed Warning Audio Volume Limit
This allows a maximum radio
volume to be set.
Select Off or On.
Teen Driver Speed Limiter
If equipped, this allows the
maximum speed limit of the vehicle
to be set.
Select Off or On.
Teen Driver Speed Warning
This allows a warning to be set
when a certain speed is exceeded.
Select Off or On.
Change PIN
This allows the Personal
Identification Number (PIN) to be
changed. See
“Teen Driver”in
“Settings” in the infotainment
manual.

Black plate (5,1)GMC 2015i Yukon Denali/Yukon XL Denali Owner Manual (GMNA-
Localizing-U.S./Canada/Mexico-8431504) - 2015 - CRC - 7/30/14
Lighting 6-5
Turn and Lane-Change
Signals
An arrow on the instrument cluster
flashes in the direction of the turn or
lane change.
Move the turn signal lever all the
way up or down to signal a turn.
Raise or lower the lever for less
than one second until the arrow
starts to flash to signal a lane
change. This causes the turn
signals to automatically flash three
times. It will flash six times if Tow/
Haul Mode is active. Holding the
turn signal lever for more thanone second will cause the turn
signals to flash until the lever is
released.
The lever returns to its starting
position whenever it is released.
If after signaling a turn or a lane
change the arrows flash rapidly or
do not come on, a signal bulb could
be burned out.
Replace any burned out bulbs. If a
bulb is not burned out, check the
fuse. See
Fuses on page 10-31.
Turn Signal On Chime
If the turn signal is left on for more
than 1.2 km (0.75 mi), a chime
sounds at each flash of the turn
signal. The message TURN
SIGNAL ON will also appear in the
Driver Information Center (DIC). To
turn the chime and message off,
move the turn signal lever to the off
position.
Fog Lamps
If equipped with fog lamps, the
button is on the exterior lamp
control, to the left of the steering
column.
The ignition must be in the ON/RUN
position for the fog lamps to
come on.
#(Fog Lamps): Press to turn the
fog lamps on or off. A light will come
on in the instrument cluster.

Black plate (3,1)GMC 2015i Yukon Denali/Yukon XL Denali Owner Manual (GMNA-
Localizing-U.S./Canada/Mexico-8431504) - 2015 - CRC - 7/30/14
Climate Controls 8-3
Changing the mode cancels the
automatic operation and the system
goes into manual mode. Press
AUTO to return to automatic
operation.
Y(Vent):Air is directed to the
instrument panel outlets.
\(Bi-Level): Air is divided
between the instrument panel and
floor outlets.
[(Floor): Air is directed to the
floor outlets, with some to the
windshield, side window outlets, and
second row floor outlets.
-(Defog): This mode clears the
windows of fog or moisture. Air is
directed to the windshield, floor
outlets, and side window vents.
0(Defrost): Press to clear the
windshield of fog or frost more
quickly. Air is directed to the
windshield and the side window
vents. The system automatically
forces outside air into the vehicle and the air conditioning compressor
will run, unless the outside
temperature is close to freezing.
Do not drive the vehicle until all
windows are clear.
See
Air Vents on page 8-6.
A/C (Air Conditioning): Press to
turn the air conditioning system on
or off. An indicator light comes on to
show that the air conditioning is
enabled. If the fan is turned off, the
air conditioner will not run. The A/C
light will stay on even if the outside
temperatures are below freezing.
@(Recirculation): Press to turn
on recirculation. An indicator light
comes on. Air is recirculated to
quickly cool the inside of the
vehicle. It can also be used to help
reduce outside air and odors that
enter the vehicle. The air
conditioning compressor also comes
on when this mode is activated.
Auto Defog: The climate control
system may have a sensor to
automatically detect high humidity inside the vehicle. When high
humidity is detected, the climate
control system may adjust to
outside air supply and turn on the
air conditioner. If the climate control
system does not detect possible
window fogging, it returns to normal
operation. To turn Auto Defog off or
on, see
“Climate and Air Quality”
under Vehicle Personalization on
page 5-50.
Rear Window Defogger
The rear window defogger uses a
warming grid to remove fog from the
rear window.
K(Rear Window Defogger):
Press to turn the rear window
defogger on or off. An indicator light
on the button comes on to show that
the rear window defogger is on.
The rear window defogger only
works when the ignition is in ON/
RUN. The defogger turns off if the
ignition is turned to ACC/
ACCESSORY or LOCK/OFF.

Black plate (5,1)GMC 2015i Yukon Denali/Yukon XL Denali Owner Manual (GMNA-
Localizing-U.S./Canada/Mexico-8431504) - 2015 - CRC - 7/30/14
Climate Controls 8-5
There is also an exterior
temperature sensor 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, including a snowplow, could
cause a false reading in the
displayed temperature.
The climate control system uses the
information from these sensors to
maintain comfort settings by
adjusting the outlet temperature, fan
speed, and 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.
Rear Climate Control
System
The rear climate control system is
located on the rear of the center
console storage. The rear climate
settings can be adjusted with this
system.
1. Fan Control
2. AUTO (Automatic Operation)
3. MODE (Air Delivery ModeControl)
4. TEMP (Temperature Control)
5. Heated Rear Seats
If the dual automatic climate control
system rear climate control lockout
feature is locked, the rear climate
control settings can only be
adjusted from the front seat.
Automatic Operation
AUTO: Press AUTO to control the
inside temperature, air delivery, and
fan speed. A is indicated in the
display when automatic operation is
active. If any of the climate control
settings are manually adjusted, this
cancels full automatic operation.
The display only indicates climate
control functions when the system is
in rear independent mode.
Manual Operation
9(Fan Control): Turn clockwise
or counterclockwise to increase or
decrease the fan speed. Turn
completely counterclockwise to turn
the fan/power off.
TEMP (Temperature Control):
Turn clockwise or counterclockwise
to increase or decrease the airflow
temperature into the passenger
area. If the SYNC button is pressed
on the front climate controls, the
rear climate temperature is linked to
the driver temperature setting.

Black plate (1,1)GMC 2015i Yukon Denali/Yukon XL Denali Owner Manual (GMNA-
Localizing-U.S./Canada/Mexico-8431504) - 2015 - CRC - 7/30/14
Driving and Operating 9-1
Driving and
Operating
Driving Information
Distracted Driving . . . . . . . . . . . . . 9-2
Defensive Driving . . . . . . . . . . . . . 9-3
Drunk Driving . . . . . . . . . . . . . . . . . 9-3
Control of a Vehicle . . . . . . . . . . . 9-3
Braking . . . . . . . . . . . . . . . . . . . . . . . 9-3
Steering . . . . . . . . . . . . . . . . . . . . . . . 9-4
Off-Road Recovery . . . . . . . . . . . . 9-5
Loss of Control . . . . . . . . . . . . . . . . 9-5
Off-Road Driving . . . . . . . . . . . . . . 9-6
Driving on Wet Roads . . . . . . . 9-10
Hill and Mountain Roads . . . . . 9-11
Winter Driving . . . . . . . . . . . . . . . 9-12
If the Vehicle Is Stuck . . . . . . . . 9-13
Vehicle Load Limits . . . . . . . . . . 9-15
Starting and Operating
New Vehicle Break-In . . . . . . . . 9-19
Adjustable Throttle and BrakePedal . . . . . . . . . . . . . . . . . . . . . . . 9-19
Ignition Positions . . . . . . . . . . . . 9-20
Starting the Engine . . . . . . . . . . 9-22
Engine Heater . . . . . . . . . . . . . . . 9-24 Retained Accessory
Power (RAP) . . . . . . . . . . . . . . . 9-25
Shifting Into Park . . . . . . . . . . . . 9-25
Shifting out of Park . . . . . . . . . . 9-27
Parking over Things That Burn . . . . . . . . . . . . . . . . . . 9-27
Active Fuel Management
®. . . 9-27
Engine Exhaust
Engine Exhaust . . . . . . . . . . . . . . 9-28
Running the Vehicle While Parked . . . . . . . . . . . . . . . . . . . . . 9-29
Automatic Transmission
Automatic Transmission . . . . . 9-29
Manual Mode . . . . . . . . . . . . . . . . 9-32
Tow/Haul Mode . . . . . . . . . . . . . . 9-34
Drive Systems
Four-Wheel Drive . . . . . . . . . . . . 9-35
Brakes
Antilock BrakeSystem (ABS) . . . . . . . . . . . . . . 9-38
Parking Brake . . . . . . . . . . . . . . . 9-39
Brake Assist . . . . . . . . . . . . . . . . . 9-40
Hill Start Assist (HSA) . . . . . . . 9-40
Ride Control Systems
Traction Control/Electronic Stability Control . . . . . . . . . . . . 9-41
Magnetic Ride Control . . . . . . . 9-43
Locking Rear Axle . . . . . . . . . . . 9-44
Automatic Level Control . . . . . 9-44
Cruise Control
Cruise Control . . . . . . . . . . . . . . . 9-44
Adaptive Cruise Control . . . . . 9-47
Driver Assistance Systems
Driver Assistance Systems . . . . . . . . . . . . . . . . . . . . 9-54
Assistance Systems for Parking or Backing . . . . . . . . . 9-55
Assistance Systems for Driving . . . . . . . . . . . . . . . . . . . . . 9-58
Forward Collision Alert (FCA) System . . . . . . . . . . . . . . . . . . . . . 9-58
Active Emergency Braking System . . . . . . . . . . . . . . . . . . . . . 9-60
Side Blind Zone Alert (SBZA) . . . . . . . . . . . . . . . 9-62
Lane Change Alert (LCA) . . . . 9-62
Lane Departure Warning (LDW) . . . . . . . . . . . . . 9-65

Black plate (21,1)GMC 2015i Yukon Denali/Yukon XL Denali Owner Manual (GMNA-
Localizing-U.S./Canada/Mexico-8431504) - 2015 - CRC - 7/30/14
Driving and Operating 9-21
If the vehicle is not in P (Park), the
ignition will return to ACC/
ACCESSORY and display the
message SHIFT TO PARK in the
Driver Information Center (DIC).
SeeTransmission Messages on
page 5-47. When the vehicle is
shifted into P (Park), the ignition
system will switch to OFF.
Do not turn the engine off when the
vehicle is moving. This will cause a
loss of power assist in the brake
and steering systems and disable
the airbags.
The vehicle may have an electric
steering column lock. The lock is
activated when the vehicle is
switched to OFF and either front
door is opened. A sound may be
heard as the lock actuates or
releases. The steering column lock
may not release with the wheels
turned off center. If this happens,
the vehicle may not start. Move the
steering wheel from left to right
while attempting to start the vehicle.
If this does not work, the vehicle
needs service. If the vehicle must be shut off in an
emergency:
1. Brake using a firm and steady
pressure. Do not pump the
brakes repeatedly. This may
deplete power assist, requiring
increased brake pedal force.
2. Shift the vehicle to N (Neutral). This can be done while the
vehicle is moving. After shifting
to N (Neutral), firmly apply the
brakes and steer the vehicle to a
safe location.
3. Come to a complete stop, shift to P (Park), and turn the ignition
to OFF. On vehicles with an
automatic transmission, the shift
lever must be in P (Park) to turn
the ignition switch to the OFF
position.
4. Set the parking brake. See Parking Brake on page 9-39.{Warning
Turning off the vehicle while
moving may cause loss of power
assist in the brake and steering
systems and disable the airbags.
While driving, only shut the
vehicle off in an emergency.
If the vehicle cannot be pulled over,
and must be shut off while driving,
press and hold the ENGINE START/
STOP button for longer than
two seconds, or press twice in
five seconds.
ACC/ACCESSORY (Amber
Indicator Light): This mode allows
some electrical accessories to be
used when the engine is off.
With the ignition off, pressing the
button one time without the brake
pedal applied will place the ignition
system in ACC/ACCESSORY.

Black plate (22,1)GMC 2015i Yukon Denali/Yukon XL Denali Owner Manual (GMNA-
Localizing-U.S./Canada/Mexico-8431504) - 2015 - CRC - 7/30/14
9-22 Driving and Operating
The ignition will switch from ACC/
ACCESSORY to OFF after
five minutes to prevent battery
rundown.
ON/RUN/START (Green Indicator
Light):This mode is for driving and
starting. With the ignition off, and
the brake pedal applied, pressing
the button once will place the
ignition system in ON/RUN/START.
Once engine cranking begins,
release the button. Engine cranking
will continue until the engine starts.
See Starting the Engine on
page 9-22. The ignition will then
remain in ON/RUN.
Service Only Mode
This power mode is available for
service and diagnostics, and to
verify the proper operation of the
malfunction indicator lamp as may
be required for emission inspection
purposes. With the vehicle off, and
the brake pedal not applied,
pressing and holding the button for
more than five seconds will place
the vehicle in Service Only Mode. The instruments and audio systems
will operate as they do in ON/RUN,
but the vehicle will not be able to be
driven. The engine will not start in
Service Only Mode. Press the
button again to turn the vehicle off.
Starting the Engine
Move the shift lever to P (Park) or
N (Neutral). The engine will not start
in any other position. To restart the
engine when the vehicle is already
moving, use N (Neutral) only.
{Caution
Do not try to shift to P (Park) if the
vehicle is moving. If you do, you
could damage the transmission.
Shift to P (Park) only when the
vehicle is stopped.
{Caution
If you add electrical parts or
accessories, you could change
the way the engine operates. Any
resulting damage would not be
covered by the vehicle warranty.
See
Add-On Electrical Equipment
on page 9-84.
Starting Procedure (Key
Access)
1. With your foot off the accelerator pedal, turn the ignition key to
START. When the engine starts,
let go of the key. The idle speed
will go down as the engine gets
warm. Do not race the engine
immediately after starting it.
Operate the engine and
transmission gently to allow the
oil to warm up and lubricate all
moving parts.
When the low fuel warning lamp
is on and the FUEL LEVEL LOW
message is displayed in the

Black plate (28,1)GMC 2015i Yukon Denali/Yukon XL Denali Owner Manual (GMNA-
Localizing-U.S./Canada/Mexico-8431504) - 2015 - CRC - 7/30/14
9-28 Driving and Operating
When less power is required, such
as cruising at a constant vehicle
speed, the system will operate in
the half cylinder mode, allowing the
vehicle to achieve better fuel
economy. When greater power
demands are required, such as
accelerating from a stop, passing,
or merging onto a freeway, the
system will maintain full-cylinder
operation.
If the vehicle has an Active Fuel
Management indicator, seeDriver
Information Center (DIC) on
page 5-30 for more information on
using this display.Engine Exhaust
{Warning
Engine exhaust contains carbon
monoxide (CO) which cannot be
seen or smelled. Exposure to CO
can cause unconsciousness and
even death.
Exhaust may enter the vehicle if:
.The vehicle idles in areas
with poor ventilation (parking
garages, tunnels, deep snow
that may block underbody
airflow or tail pipes).
.The exhaust smells or
sounds strange or different.
.The exhaust system leaks
due to corrosion or damage.
.The vehicle exhaust system
has been modified, damaged,
or improperly repaired.
(Continued)
Warning (Continued)
.There are holes or openings
in the vehicle body from
damage or aftermarket
modifications that are not
completely sealed.
If unusual fumes are detected or
if it is suspected that exhaust is
coming into the vehicle:
.Drive it only with the windows
completely down.
.Have the vehicle repaired
immediately.
Never park the vehicle with the
engine running in an enclosed
area such as a garage or a
building that has no fresh air
ventilation.