
Black plate (7,1)GMC 2015i Yukon Denali/Yukon XL Denali Owner Manual (GMNA-
Localizing-U.S./Canada/Mexico-8431504) - 2015 - CRC - 7/30/14
Lighting 6-7
Reading Lamps
There are reading lamps in
the overhead console and the
headliner, if equipped. To operate,
the ignition must be in the ACC/
ACCESSORY or ON/RUN position
or using Retained Accessory
Power (RAP).
Pressmornnext to each reading
lamp to turn it on or off.
Lighting Features
Entry Lighting
The vehicle has an illuminated entry
feature.
When a door is opened, the dome
lamps and puddle lamps come on if
the dome lamp control is in the
DOOR position. If the dome lamp
control is in the OFF position, the
lamps do not come on.
The headlamps, parking lamps,
taillamps, and back-up lamps turn
on briefly at night, or in areas with
limited lighting, when
Kis pressed
on the Remote Keyless Entry (RKE)
transmitter. After about 30 seconds
the exterior lamps turn off. Entry
lighting can be disabled manually by
changing the ignition out of the OFF
position, or by pressing the RKE
transmitter
Qbutton.

Black plate (4,1)GMC 2015i Yukon Denali/Yukon XL Denali Owner Manual (GMNA-
Localizing-U.S./Canada/Mexico-8431504) - 2015 - CRC - 7/30/14
8-4 Climate Controls
{Caution
Using a razor blade or sharp
object to clear the inside rear
window can damage the rear
window defogger. Repairs would
not be covered by the vehicle
warranty. Do not clear the inside
rear window with sharp objects.
Heated Mirror: If equipped with
heated outside rearview mirrors, the
mirrors heat to help clear fog or frost
from the surface of the mirror when
the rear window defog button is
pressed. See Heated Mirrors on
page 2-22.
Rear Climate Controls
O(On/Off): Press to turn the rear
climate control system on or off.
AUTO: Press AUTO to control the
rear passenger temperature, air
delivery, and fan speed. AUTO
appears in the display when
automatic operation is active. If any
of the climate control settings except rear temperature are
manually adjusted, this cancels full
automatic operation.
Fan Control:
Press up or down to
increase or decrease the rear
passenger area fan speed.
Air Delivery Mode Control: Press
to change the direction of the rear
passenger airflow. Repeatedly press
the switch until the desired mode
appears on the display. Multiple
presses will cycle through the
delivery selections.
Temperature Control: Press up or
down to increase or decrease the
airflow temperature into the rear
passenger area.
RCTRL (Rear Climate Control
Lockout): Press to lock or unlock
control of the rear climate control
system from the rear seat
passengers. When locked, the rear
climate control can only be adjusted
from the front seat. Remote Start Climate Control
Operation
If equipped with the remote start
feature, the climate control system
will come on when the vehicle is
started remotely, depending on the
outside temperature. The rear
window defogger and heated seats,
if equipped, may also come on. See
Remote Vehicle Start on page 2-9
and
Heated and Cooled Front Seats
on page 3-7.
Sensors
The solar sensor monitors the solar
heat. Do not cover the solar sensor
or the system will not work properly.

Black plate (20,1)GMC 2015i Yukon Denali/Yukon XL Denali Owner Manual (GMNA-
Localizing-U.S./Canada/Mexico-8431504) - 2015 - CRC - 7/30/14
9-20 Driving and Operating
No adjustment to the pedals can be
made when the vehicle is in
R (Reverse) or while using cruise
control.
The switch used to adjust the
pedals is to the left of the steering
wheel.
Press the switch to the left to move
the pedals closer to your body.
Press the switch to the right to move
the pedals away.Before you start driving, fully press
the brake pedal to confirm the
adjustment is right for you. While
driving, make only small
adjustments.
The vehicle may have a memory
function, which lets pedal settings
be saved and recalled. See
Memory
Seats on page 3-5.
Ignition Positions
Vehicles with Keyless Access have
pushbutton starting. Pressing the button cycles it through
three modes: ACC/ACCESSORY,
ON/RUN/START, and Stopping the
Engine/OFF.
The transmitter must be in the
vehicle for the system to operate.
If the pushbutton start is not
working, the vehicle may be near a
strong radio antenna signal causing
interference to the Keyless Access
system. See
Remote Keyless Entry
(RKE) System Operation on
page 2-3.
To shift out of P (Park), the vehicle
must be in ACC/ACCESSORY or
ON/RUN and the brake pedal must
be applied.
Stopping the Engine/LOCK/
OFF (No Indicator Lights): When
the vehicle is stopped, press the
ENGINE START/STOP button once
to turn the engine off.
If the vehicle is in P (Park), the
ignition will turn off, and Retained
Accessory Power (RAP) will remain
active. See Retained Accessory
Power (RAP) on page 9-25.

Black plate (78,1)GMC 2015i Yukon Denali/Yukon XL Denali Owner Manual (GMNA-
Localizing-U.S./Canada/Mexico-8431504) - 2015 - CRC - 7/30/14
9-78 Driving and Operating
Safety Chains
Always attach chains between the
vehicle and the trailer. Cross the
safety chains under the tongue of
the trailer to help prevent the tongue
from contacting the road if it
becomes separated from the hitch.
Instructions about safety chains
may be provided by the hitch
manufacturer or by the trailer
manufacturer. If the trailer being
towed weighs up to 2 271 kg
(5,000 lb) with a factory-installed
step bumper, safety chains may be
attached to the attaching points on
the bumper, otherwise, safety
chains should be attached to holes
on the trailer hitch platform. Always
leave just enough slack so the
combination can turn. Never allow
safety chains to drag on the ground.
Trailer Brakes
A loaded trailer that weighs more
than 900 kg (2,000 lb) needs to have
its own brake system that is
adequate for the weight of the
trailer. Be sure to read and followthe instructions for the trailer brakes
so they are installed, adjusted, and
maintained properly.
Since the vehicle is equipped with
StabiliTrak, the trailer brakes cannot
tap into the vehicle's hydraulic
system.
Trailer Wiring Harness
The seven-pin trailer connector is
mounted in the bumper. This
connector can be plugged into a
seven-pin universal heavy-duty
trailer connector available through
your dealer.
The seven-wire harness contains
the following trailer circuits:
.Yellow: Left Stop/Turn Signal
.Green/Violet: Right Stop/Turn
Signal
.Brown: Taillamps
.White: Ground
.Light Green: Back-up Lamps
.Red/Green: Battery Feed
.Dark Blue: Trailer BrakeIf charging a remote (non-vehicle)
battery, press the Tow/Haul mode
button at the end of the shift lever.
This will boost the vehicle system
voltage and properly charge the
battery. If the trailer is too light for
Tow/Haul mode, turn on the
headlamps as a second way to
boost the vehicle system and
charge the battery.
Electric Brake Control Wiring
Provisions
These wiring provisions are
included with the vehicle as part of
the trailer wiring package. These
provisions are for an electric brake
controller.
The harness should be installed by
your dealer or a qualified service
center.

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
Vehicle Care 10-3
cause cancer and birth defects or
other reproductive harm. Engine
exhaust, many parts and systems,
many fluids, and some component
wear by-products contain and/or
emit these chemicals.
California Perchlorate
Materials Requirements
Certain types of automotive
applications, such as airbag
initiators, safety belt pretensioners,
and lithium batteries contained in
Remote Keyless Entry transmitters,
may contain perchlorate materials.
Special handling may be necessary.
For additional information, see
www.dtsc.ca.gov/hazardouswaste/
perchlorate.
Accessories and
Modifications
Adding non‐dealer accessories or
making modifications to the vehicle
can affect vehicle performance and
safety, including such things as
airbags, braking, stability, ride andhandling, emissions systems,
aerodynamics, durability, and
electronic systems like antilock
brakes, traction control, and stability
control. These accessories or
modifications could even cause
malfunction or damage not covered
by the vehicle warranty.
Damage to vehicle components
resulting from modifications or the
installation or use of non‐GM
certified parts, including control
module or software modifications, is
not covered under the terms of the
vehicle warranty and may affect
remaining warranty coverage for
affected parts.
GM Accessories are designed to
complement and function with other
systems on the vehicle. See your
dealer to accessorize the vehicle
using genuine GM Accessories
installed by a dealer technician.
Also, see
Adding Equipment to the
Airbag-Equipped Vehicle on
page 3-37.
Vehicle Checks
Doing Your Own
Service Work
{Warning
It can be dangerous to work on
your vehicle if you do not have
the proper knowledge, service
manual, tools, or parts. Always
follow owner manual procedures
and consult the service manual
for your vehicle before doing any
service work.
If doing some of your own service
work, use the proper service
manual. It tells you much more
about how to service the vehicle
than this manual can. To order the
proper service manual, see Service
Publications Ordering Information
on page 13-11.

Black plate (7,1)GMC 2015i Yukon Denali/Yukon XL Denali Owner Manual (GMNA-
Localizing-U.S./Canada/Mexico-8431504) - 2015 - CRC - 7/30/14
OnStar 14-7
in that area. The wireless service
provider must also have coverage,
network capacity, reception, and
technology compatible with OnStar
services. Service involving location
information about the vehicle cannot
work unless GPS signals are
available, unobstructed, and
compatible with the OnStar
hardware. OnStar services may not
work if the OnStar equipment is not
properly installed or it has not been
properly maintained. If equipment or
software is added, connected,
or modified, OnStar services may
not work. Other problems beyond
the control of OnStar may prevent
service such as hills, tall buildings,
tunnels, weather, electrical system
design and architecture of the
vehicle, damage to the vehicle in a
crash, or wireless phone network
congestion or jamming.
SeeRadio Frequency Statement on
page 13-12.Services for People with
Disabilities
Advisors provide services to help
subscribers with physical disabilities
and medical conditions.
Press
Qfor help with:
.Locating a gas station with an
attendant to pump gas.
.Finding a hotel, restaurant, etc.,
that meets accessibility needs.
.Providing directions to the
closest hospital or pharmacy in
urgent situations.
TTY Users
OnStar has the ability to
communicate to deaf,
hard-of-hearing, or speech-impaired
customers while in the vehicle. The
available dealer-installed TTY
system can provide in-vehicle
access to all of the OnStar services,
except Virtual Advisor and OnStar
Turn-by-Turn Navigation.
OnStar Personal Identification
Number (PIN)
A PIN is needed to access some of
the OnStar services, like Remote
Door Unlock and Stolen Vehicle
Assistance. The PIN will need to be
changed the first time when
speaking with an Advisor. To
change the OnStar PIN, contact an
OnStar Advisor by pressing
Qor
calling 1-888-4-ONSTAR.
Warranty
OnStar equipment may be
warranted as part of the vehicle
warranty.
Languages
The vehicle can be programmed to
respond in multiple languages.
Press
Qand ask for an Advisor.
Advisors are available in English,
Spanish, and French. Available
languages may vary by country.

Black plate (6,1)GMC 2015i Yukon Denali/Yukon XL Denali Owner Manual (GMNA-
Localizing-U.S./Canada/Mexico-8431504) - 2015 - CRC - 7/30/14
i-6 INDEX
Hill and Mountain Roads . . . . . . . 9-11
Hill Start Assist (HSA) . . . . . . . . . 9-40
Hood . . . . . . . . . . . . . . . . . . . . . . . . . . 10-4
Horn . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3
How to Wear Safety BeltsProperly . . . . . . . . . . . . . . . . . . . . . . 3-18
I
Ignition Positions . . . . . . . . . . . . . . 9-20
Immobilizer . . . . . . . . . . . . . . . . . . . . 2-21
IndicatorVehicle Ahead . . . . . . . . . . . . . . . . 5-25
Infants and Young Children,
Restraints . . . . . . . . . . . . . . . . . . . . 3-41
Infotainment . . . . . . . . . . . . . . . . . . . . 7-1
Infotainment System . . . . . . . . . . 13-15
Instrument Cluster . . . . . . . . . . . . . 5-11
Instrument Panel Storage Area . . . . . . . . . . . . . . . . . . 4-1
Interior Rearview Mirrors . . . . . . . 2-24
Introduction . . . . . . . . . . . . . . . . . . . . . . . iii
J
Jump Starting . . . . . . . . . . . . . . . . . 10-74
K
Key and Lock Messages . . . . . . . 5-42
Keyless Entry Remote (RKE) System . . . . . . . . 2-3
Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
L
Labeling, Tire Sidewall . . . . . . . . 10-43
Lamps Daytime Running (DRL) . . . . . . . 6-3
Dome . . . . . . . . . . . . . . . . . . . . . . . . . . 6-6
Exterior Controls . . . . . . . . . . . . . . . 6-1
Exterior Lamps OffReminder . . . . . . . . . . . . . . . . . . . . 6-2
Fog . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-5
License Plate . . . . . . . . . . . . . . . 10-29
Malfunction Indicator . . . . . . . . . 5-20 Lamps (cont'd)
Messages . . . . . . . . . . . . . . . . . . . . 5-42
On Reminder . . . . . . . . . . . . . . . . . 5-29
Reading . . . . . . . . . . . . . . . . . . . . . . . 6-7
Lane Change Alert . . . . . . . . . . . . 9-62
Lane Departure Warning (LDW) . . . . . . . . . . . . . . . 9-65
Lane Departure Warning Light . . . . . . . . . . . . . . . . . . . . . . . . . 5-25
Lap-Shoulder Belt . . . . . . . . . . . . . 3-19
LATCH System Replacing Parts after aCrash . . . . . . . . . . . . . . . . . . . . . . . 3-55
LATCH, Lower Anchors and
Tethers for Children . . . . . . . . . . 3-47
LED Lighting . . . . . . . . . . . . . . . . . . 10-27
Level Control Automatic . . . . . . . . . . . . . . . . . . . . . 9-44
Liftgate . . . . . . . . . . . . . . . . . . . . . . . . 2-13
Lighting Entry . . . . . . . . . . . . . . . . . . . . . . . . . . 6-7
Exit . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-8
Illumination Control . . . . . . . . . . . . 6-6
LED . . . . . . . . . . . . . . . . . . . . . . . . 10-27

Black plate (9,1)GMC 2015i Yukon Denali/Yukon XL Denali Owner Manual (GMNA-
Localizing-U.S./Canada/Mexico-8431504) - 2015 - CRC - 7/30/14
INDEX i-9
Perchlorate MaterialsRequirements, California . . . . . 10-3
Personalization Vehicle . . . . . . . . . . . . . . . . . . . . . . . 5-50
Power Door Locks . . . . . . . . . . . . . . . . . . . 2-12
Mirrors . . . . . . . . . . . . . . . . . . . . . . . . 2-22
Outlets . . . . . . . . . . . . . . . . . . . . . . . . 5-7
Protection, Battery . . . . . . . . . . . . . 6-9
Retained Accessory (RAP) . . . 9-25
Seat Adjustment . . . . . . . . . . . . . . . 3-3
Windows . . . . . . . . . . . . . . . . . . . . . 2-25
Power Assist Steps . . . . . . . . . . . . 2-18
Pregnancy, Using Safety Belts . . . . . . . . . . . . . . . . . . . . . . . . . 3-24
Privacy
Vehicle Data Recording . . . . . 13-14
Program Courtesy Transportation . . . . . . 13-8
Proposition 65 Warning, California . . . . . . . . . . . . . . . . . . . . . 10-2R
Radio Frequency
Identification (RFID) . . . . . . . . . 13-12
Radio Frequency Statement . . . . . . . . . . . . . . . . . . . 13-12
Reading Lamps . . . . . . . . . . . . . . . . . 6-7
Rear Axle . . . . . . . . . . . . . . . . . . . . . 10-23 Locking . . . . . . . . . . . . . . . . . . . . . . . 9-44
Rear Climate Control System . . . 8-5
Rear Seats Heated . . . . . . . . . . . . . . . . . . . . . . . . 3-9
Rear Storage . . . . . . . . . . . . . . . . . . . 4-2
Rear Window Washer/Wiper . . . . 5-5
Rearview Mirrors Automatic Dimming . . . . . . . . . . . 2-24
Reclining Seatbacks . . . . . . . . . . . . 3-4
Recommended Fluids and
Lubricants . . . . . . . . . . . . . . . . . . . 11-11
Records Maintenance . . . . . . . . . . . . . . . . .11-14
Recreational Vehicle Towing . . . . . . . . . . . . . . . . . . . . . . 10-77
Reimbursement Program, GM Mobility . . . . . . . . . . . . . . . . . . 13-5
Remote Keyless Entry
(RKE) System . . . . . . . . . . . . . 2-2, 2-3 Remote Vehicle Start . . . . . . . . . . . 2-9
Replacement
Glass . . . . . . . . . . . . . . . . . . . . . . . 10-26
Replacement Bulbs . . . . . . . . . . . 10-30
Replacement Parts Airbags . . . . . . . . . . . . . . . . . . . . . . . 3-39
Maintenance . . . . . . . . . . . . . . . . .11-13
Replacing Airbag System . . . . . . 3-39
Replacing LATCH System Parts after a Crash . . . . . . . . . . . 3-55
Replacing Safety Belt
System Parts after a Crash . . . 3-25
Reporting Safety Defects Canadian Government . . . . . . 13-13
General Motors . . . . . . . . . . . . . 13-14
U.S. Government . . . . . . . . . . . 13-13
Restraints Where to Put . . . . . . . . . . . . . . . . . 3-46
Retained Accessory Power (RAP) . . . . . . . . . . . . . . . . . 9-25
Reverse Tilt Mirrors . . . . . . . . . . . . 2-24
Ride Control Systems
Magnetic . . . . . . . . . . . . . . . . . . . . . 9-43
Messages . . . . . . . . . . . . . . . . . . . . 5-44
Roads
Driving, Wet . . . . . . . . . . . . . . . . . . 9-10