
GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-15555988) - 2022 - CRC - 12/3/21
Driving and Operating 279
Use only a round, seven-wire connector with
flat blade terminals meeting SAE J2863
specifications for proper electrical
connectivity.
The seven-wire harness contains the
following trailer circuits:
.Yellow/Grey: Left Stop/Turn Signal
.Green/Violet: Right Stop/Turn Signal
.Grey/Brown: Taillamps
.White: Ground
.White/Green: Back-up Lamps
.Red/Green: Battery Feed
.Dark Blue: Trailer Brake
To help charge a remote (non-vehicle)
battery change drive mode to Tow Haul.
If the trailer is too light for Tow/Haul Mode,
turn on the headlamps to help 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. Refer to the aftermarket electric trailer brake
controller owner's manual to determine wire
color coding of the electric trailer brake
controller. The wire colors on the brake
controller may be different from the vehicle.
Trailer Lamps
Always check all trailer lamps are working at
the beginning of each trip, and periodically
on longer trips.
If equipped, the Trailering App will monitor
the RH turn/brake lamp circuit, LH turn/
brake lamp circuit, running lamp circuit, and
reverse lamp circuits on the trailer. DIC
messages and Trailering App alerts may be
displayed if lighting circuit issues are
detected on the trailer.
Pressing START LIGHT TEST in the Trailering
App automatically activates trailer lamps.
The Trailering App is not a substitute for
manually inspecting your trailer lamps. See
Trailering App
0285.
Trailer Connection and Lamp Messages
When a trailer is properly connected and
working, no trailer connection or lamp
messages appear on the Driver Information Center (DIC). However; if the vehicle detects
an issue with a trailer connection or lamp,
you may see the following DIC message(s):
.TRAILER DISCONNECTED CHECK
CONNECTION appears when a connected
trailer is disconnected. It appears
immediately when the vehicle is on,
or upon the next start-up if the trailer
was disconnected while the vehicle was
off. Check the trailer connection as
appropriate.
.CHECK TRAILER XXX LAMP appears when
there is a detected lamp or wiring fault
on the trailer. Check the trailer wiring and
lamps.
Turn Signals When Towing a Trailer
When properly connected, the trailer turn
signals should will illuminate to indicate the
vehicle is turning, changing lanes,
or stopping. When towing a trailer, the
arrows on the instrument cluster will
illuminate even if the trailer is not properly
connected or the bulbs are burned out.

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-15555988) - 2022 - CRC - 12/3/21
Customer Information 399
and notify General Motors of Canada
Company. Call Transport Canada at
1-800-333-0510; go to:
www.tc.gc.ca/recalls (English)
www.tc.gc.ca/rappels (French)
or write to:
Transport Canada
Motor Vehicle Safety Directorate
Defect Investigations and Recalls
Division
80 Noel Street
Gatineau
,QC J8Z 0A1
Reporting Safety Defects to
General Motors
In addition to notifying NHTSA (or Transport
Canada) in a situation like this, notify
General Motors.
In the U.S., call 1-800-462-8782, or write:
GMC Customer Assistance Center
P.O. Box 33172
Detroit, MI 48232-5172
In Canada, call 1-800-263-3777 (English) or
1-800-263-7854 (French), or write:General Motors of Canada Company
Customer Care Centre, Mail Code:
CA1-163-005
1908 Colonel Sam Drive
Oshawa, Ontario L1H 8P7
In Mexico, call 800-466-0812 or
800-466-0801.
In other Central America and Caribbean
Countries, call 52-555-901-2369.
Vehicle Data Recording and
Privacy
The vehicle has a number of computers that
record information about the vehicle’s
performance and how it is driven or used.
For example, the vehicle uses computer
modules to monitor and control engine and
transmission performance, to monitor the
conditions for airbag deployment and
deploy them in a crash, and, if equipped, to
provide antilock braking to help the driver
control the vehicle. These modules may
store data to help the dealer technician
service the vehicle or to help GM improve
safety or features. Some modules may also
store data about how the vehicle is
operated, such as rate of fuel consumptionor average speed. These modules may retain
personal preferences, such as radio presets,
seat positions, and temperature settings.
Cybersecurity
GM collects information about the use of
your vehicle including operational and safety
related information. We collect this
information to provide, evaluate, improve,
and troubleshoot our products and services
and to develop new products and services.
The protection of vehicle electronics systems
and customer data from unauthorized
outside electronic access or control is
important to GM. GM maintains appropriate
security standards, practices, guidelines and
controls aimed at defending the vehicle and
the vehicle service ecosystem against
unauthorized electronic access, detecting
possible malicious activity in related
networks, and responding to suspected
cybersecurity incidents in a timely,
coordinated and effective manner. Security
incidents could impact your safety or
compromise your private data. To minimize
security risks, please do not connect your
vehicle electronic systems to unauthorized
devices or connect your vehicle to any
unknown or untrusted networks (such as
Bluetooth, WIFI or similar technology). In

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-15555988) - 2022 - CRC - 12/3/21
OnStar 401
OnStar
OnStar Overview
OnStar Overview . . . . . . . . . . . . . . . . . . . . . . 401
OnStar Services
Emergency . . . . . . . . . . . . . . . . . . . . . . . . . . . . 402
Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 402
OnStar Additional Information
OnStar Additional Information . . . . . . . . 402
OnStar Overview
=Voice Command Button
QBlue OnStar Button
>Red Emergency Button
This vehicle may be equipped with a
comprehensive, in-vehicle system that can
connect to an OnStar Advisor for Emergency,
Security, Navigation, Connections, and
Diagnostics Services. OnStar services may
require a paid service plan and data plan.
OnStar requires the vehicle battery and
electrical system, cellular service, and GPS
satellite signals to be available and
operating. OnStar acts as a link to existing
emergency service providers. OnStar may
collect information about you and your
vehicle, including location information. See
OnStar User Terms, Privacy Statement, and
Software Terms for more details including
system limitations at www.onstar.com (U.S.)
or www.onstar.ca (Canada). The OnStar system status light is next to
the OnStar buttons. If the status light is:
.Solid Green: System is ready.
.Flashing Green: On a call.
.Red: Indicates a problem.
.Off: System is off. PressQtwice to
speak with an OnStar Advisor.
Press
Qor call 1-888-4ONSTAR
(1-888-466-7827) to speak to an Advisor.
Functionality of the Voice Command button
may vary by vehicle and region.
Press
=to answer or hang up an
Advisor-initiated call.
Press
Qto connect to an Advisor to:
.Verify account information or update
contact information.
.Get driving directions.
.Receive a Diagnostic check of the vehicle's
key operating systems.
.Receive Roadside Assistance.
.Manage Wi-Fi Settings, if equipped.

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./Cana-
da/Mexico-15555988) - 2022 - RegulatoryCompliance - 12/3/21
410 Index
Assistance Systems for Driving . . . . . . . . . . 254
Assistance Systems for Parking andBacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 243
Audio Bluetooth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156
Auto Stop Stop/Start System . . . . . . . . . . . . . . . . . . . . . 208
Automatic Dimming Mirrors . . . . . . . . . . . . . . . . . . . . . . . 29
Door Locks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Emergency Braking (AEB) . . . . . . . . . . . . . . 256
Headlamp System . . . . . . . . . . . . . . . . . . . . . 140
Transmission . . . . . . . . . . . . . . . . . . . . . . . . . . . . 211
Transmission Fluid . . . . . . . . . . . . . . . . . . . . . 305
Automatic Transmission Manual Mode . . . . . . . . . . . . . . . . . . . . . . . . . 214
Avoiding Untrusted Media Devices . . . . . . . . 155
Axle, Front . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 315
Axle, Rear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 315
B
Battery Exterior Lighting Battery Saver . . . . . . . . 145
Load Management . . . . . . . . . . . . . . . . . . . . . 144
Power Protection . . . . . . . . . . . . . . . . . . . . . . 145
Battery - North America . . . . . . . . . . . . . 314, 357
Blade Replacement, Wiper . . . . . . . . . . . . . . . 316 Bluetooth
Overview . . . . . . . . . . . . . . . . . . . . . . . . . 167, 168
Bluetooth Audio . . . . . . . . . . . . . . . . . . . . . . . . . 156
Brake Electric Boost . . . . . . . . . . . . . . . . . . . . . . . . . . 219
Parking, Electric . . . . . . . . . . . . . . . . . . . . . . . . 219
System Warning Light . . . . . . . . . . . . . . . . . . 115
Brake Pad Life System . . . . . . . . . . . . . . . . . . . . 312
Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 311 Antilock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 219
Assist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 221
Fluid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 313
Pad Life System . . . . . . . . . . . . . . . . . . . . . . . 312
Braking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 192 Automatic Emergency (AEB) . . . . . . . . . . . 256
Reverse Automatic . . . . . . . . . . . . . . . . . . . . . 251
Braking System Front Pedestrian (FPB) . . . . . . . . . . . . . . . . . 257
Break-In, New Vehicle . . . . . . . . . . . . . . . . . . . . 205
Buckle To Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Bulb Replacement Headlamp Aiming . . . . . . . . . . . . . . . . . . . . . . 318
Buying New Tires . . . . . . . . . . . . . . . . . . . . . . . . .341
C
Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
California Perchlorate MaterialsRequirements . . . . . . . . . . . . . . . . . . . . . . . . 296
California Proposition 65 Warning . . . . . . . . . . . . . . . . . . . . . . . .314, 357, Back Cover
Camera Rear Vision (RVC) . . . . . . . . . . . . . . . . . . . . . . 243
Canadian Vehicle Owners . . . . . . . . . . . . . . . . . . .2
Capacities and Specifications . . . . . . . . . . . . . 387
Carbon Monoxide Engine Exhaust . . . . . . . . . . . . . . . . . . . . . . . . . 211
Liftgate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Winter Driving . . . . . . . . . . . . . . . . . . . . . . . . . 199
Cargo Tie-Downs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
Caution, Danger, and Warning . . . . . . . . . . . . . .2
Center Console Storage . . . . . . . . . . . . . . . . . . . 92
Chains, Tire . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 345
Charging
Wireless . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
Charging System Light . . . . . . . . . . . . . . . . . . . . 113
Check
Engine Light (Malfunction Indicator) . . . . 114

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./Cana-
da/Mexico-15555988) - 2022 - RegulatoryCompliance - 12/3/21
416 Index
OnStar Emergency . . . . . . . . . . . . . . . . . . . . . . . 402
OnStar Overview . . . . . . . . . . . . . . . . . . . . . . . . . 401
OnStar Security . . . . . . . . . . . . . . . . . . . . . . . . . . 402
OperationFog Lamps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142
Outlets Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101
Overheating, Engine . . . . . . . . . . . . . . . . . . . . . 309
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .147 Instrument Panel . . . . . . . . . . . . . . . . . . . . . . . . 4
P
ParkShifting Into . . . . . . . . . . . . . . . . . . . . . . . . . . . 209
Shifting Out of . . . . . . . . . . . . . . . . . . . . . . . . 210
Park Assist . . . . . . . . . . . . . . . . . . . . . . . . . . 243, 250
Parking Brake and P (Park) MechanismCheck . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 315
Extended . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 210
Over Things That Burn . . . . . . . . . . . . . . . . . 210
Parking or Backing Assistance Systems . . . . . . . . . . . . . . . . . . . . 243
Passenger Airbag Status Indicator . . . . . . . . . 113
Passenger Compartment Air Filter . . . . . . . .187
Passenger Sensing System . . . . . . . . . . . . . . . . 66
Pedestrian Ahead Indicator . . . . . . . . . . . . . . . 118 Perchlorate Materials Requirements,
California . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 296
Personalization Vehicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130
Phone Apple CarPlay and Android Auto . . . . . . . . 172
Bluetooth . . . . . . . . . . . . . . . . . . . . . . . . . 167, 168
Port USB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155
Positioning Vehicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165
Power Door Locks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Mirrors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Outlets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101
Protection, Battery . . . . . . . . . . . . . . . . . . . . . 145
Retained Accessory (RAP) . . . . . . . . . . . . . . 209
Seat Adjustment . . . . . . . . . . . . . . . . . . . . . . . . 39
Windows . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Power Assist Steps . . . . . . . . . . . . . . . . . . . . . . . . 24
Pregnancy, Using Seat Belts . . . . . . . . . . . . . . 59
Privacy Vehicle Data Recording . . . . . . . . . . . . . . . . 399
Problems with Route Guidance . . . . . . . . . . 165
Program Courtesy Transportation . . . . . . . . . . . . . . . 395
Prohibited Fuels . . . . . . . . . . . . . . . . . . . . . . . . . 264 Proposition 65 Warning,
California . . . . . . . . . . . . . . . . . . . . . . . . . .314, 357,
Back Cover
Publication Ordering Information . . . . . . . . 397
R
Radio Data System (RDS) . . . . . . . . . . . . . . . . . 153
Radio Frequency Statement . . . . . . . . . . . . . . 398
Radio Reception . . . . . . . . . . . . . . . . . . . . . . . . . .154
Radios AM-FM Radio . . . . . . . . . . . . . . . . . . . . . . . . . . 152
Satellite . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153
Reading Lamps . . . . . . . . . . . . . . . . . . . . . . . . . . .143
Rear Seat Infotainment (RSI) System . . . . . . . . 156
Rear Axle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 315 Locking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 227
Rear Camera Mirror . . . . . . . . . . . . . . . . . . . . . . . 29
Rear Climate Control System . . . . . . . . . . . . .185
Rear Cross Traffic Alert System . . . . . . . . . . 253
Rear Pedestrian Alert . . . . . . . . . . . . . . . . . . . . 252
Rear Seats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44 Heated . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Rear Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .91
Rear Vision Camera (RVC) . . . . . . . . . . . . . . . . 243
Rear Window Washer/Wiper . . . . . . . . . . . . . 99
Rearview Mirrors . . . . . . . . . . . . . . . . . . . . . . . . . 29 Automatic Dimming . . . . . . . . . . . . . . . . . . . . 29