
GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-1500-11698638) - 2019 - crc - 5/15/18
OnStar 451Languages The vehicle can be programmed to
respond in multiple languages.
Press
Q and ask for an Advisor.
Advisors are available in English,
Spanish, and French. Available
languages may vary by country.
Potential Issues OnStar cannot perform Remote
Door Unlock or Stolen Vehicle
Assistance after the vehicle has
been off continuously for 10 days
without an ignition cycle. If the
vehicle has not been started for
10 days, OnStar can contact
Roadside Assistance or a locksmith
to help gain access to the vehicle.
Global Positioning
System (GPS) .
Obstruction of the GPS can
occur in a large city with tall
buildings; in parking garages;
around airports; in tunnels and
underpasses; or in an area with
very dense trees. If GPS signals
are not available, the OnStar
system should still operate to call OnStar. However, OnStar
could have difficulty identifying
the exact location.
.
In emergency situations, OnStar
can use the last stored GPS
location to send to emergency
responders.
A temporary loss of GPS can cause
loss of the ability to send a
Turn-by-Turn Navigation route. The
Advisor may give a verbal route or
may ask for a call back after the
vehicle is driven into an open area.
Cellular and GPS Antennas Cellular reception is required for
OnStar to send remote signals to
the vehicle. Do not place items over
or near the antenna to prevent
blocking cellular and GPS signal
reception.
Unable to Connect to OnStar
Message
If there is limited cellular coverage
or the cellular network has reached
maximum capacity, this message may come on. Press
Q to try the
call again or try again after driving a
few miles into another cellular area.
Vehicle and Power Issues OnStar services require a vehicle
electrical system, wireless service,
and GPS satellite technologies to be
available and operating for features
to function properly. These systems
may not operate if the battery is
discharged or disconnected.
Add-on Electrical Equipment The OnStar system is integrated
into the electrical architecture of the
vehicle. Do not add any electrical
equipment. See Add-On Electrical
Equipment 0 306 . Added electrical
equipment may interfere with the
operation of the OnStar system and
cause it to not operate.
Vehicle Software Updates
OnStar or GM may remotely deliver
software updates or changes to the
vehicle without further notice or
consent. These updates or changes
may enhance or maintain safety,

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-1500-11698638) - 2019 - crc - 5/15/18
Connected Services 457vehicles, the SSID and
password can be changed in
the Wi-Fi Hotspot menu.
After initial set-up, your vehicle ’ s
Wi-Fi hotspot will connect
automatically to your mobile
devices. Manage data usage by
turning Wi-Fi on or off on your
mobile device, using the myGMC
mobile app, or by contacting an
OnStar Advisor. On some vehicles,
Wi-Fi can also be managed from the
Wi-Fi Hotspot menu.
MyGMC Mobile App (If Available)
Download the myGMC mobile app
to compatible Apple and Android
smartphones. GMC users can
access the following services from a
smartphone:
.
Remotely start/stop the vehicle,
if factory-equipped.
.
Lock/unlock doors, if equipped
with automatic locks.
.
Activate the horn and lamps. .
Check the vehicle ’ s fuel level, oil
life, or tire pressure,
if factory-equipped with the Tire
Pressure Monitor System.
.
Send destinations to the vehicle.
.
Locate the vehicle on a map
(U.S. market only).
.
Turn the vehicle's Wi-Fi hotspot
on/off, manage settings, and
monitor data consumption,
if equipped.
.
Locate a dealer and schedule
service.
.
Request roadside assistance.
.
Set a parking reminder with pin
drop, take a photo, make a note,
and set a timer.
.
Connect with GMC on social
media.
Features are subject to change. For
myGMC mobile app information and
compatibility, see my.gmc.com.
An active OnStar or connected
service plan may be required.
A compatible device,
factory-installed remote start, and power locks are required. Data rates
apply. See www.onstar.com for
details and system limitations.
Remote Services Contact an OnStar Advisor to
unlock the doors or sound the horn
and flash the lamps.
Marketplace OnStar Advisors can provide offers
from restaurants and retailers on
your route, help locate hotels,
or book a room. These services
vary by market.
OnStar Hands-Free Calling Make and receive calls with the
built-in wireless calling service,
which requires available minutes.
Functionality of the Voice Command
button may vary by vehicle and
region. For some vehicles, press
= to open the OnStar app on the
infotainment display, then select
Hands-Free calling. For other
vehicles press
= as follows.

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/-
Mexico-1500-11698638) - 2019 - crc - 5/16/18
464 Index H Halogen Bulbs . . . . . . . . . . . . . . . . . . 346
Hazard Warning Flashers . . . . . . . 180
Head Restraints . . . . . . . . . . . . . . . . . 68
Head-up Display . . . . . . . . . . . . . . . . 163
Headlamps
Aiming . . . . . . . . . . . . . . . . . . . . . . . . 346
Automatic . . . . . . . . . . . . . . . . . . . . . 179
Bulb Replacement . . . . . . . . . . . . 346
Daytime Running
Lamps (DRL) . . . . . . . . . . . . . . . . 179
Flash-to-Pass . . . . . . . . . . . . . . . . . 179
Headlamps, Front Turn
Signal, Sidemarker, and
Parking Lamps . . . . . . . . . . . . . . 347
High-Beam On Light . . . . . . . . . . 157
High/Low Beam Changer . . . . . 178
Lamps On Reminder . . . . . . . . . 158
Heated
Rear Seats . . . . . . . . . . . . . . . . . . . . . 78
Steering Wheel . . . . . . . . . . . . . . . 131
Heated and Ventilated Front
Seats . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Heated Mirrors . . . . . . . . . . . . . . . . . . . 58
Heater
Engine . . . . . . . . . . . . . . . . . . . . . . . . 223
Heating . . . . . . . . . . . . . . . . . . . . 188, 190
High-Beam On Light . . . . . . . . . . . . 157 High-Speed Operation . . . . . . . . . . 368
Hill and Mountain Roads . . . . . . . . 206
Hill Descent Control (HDC) . . . . . 245
Hill Descent Control Light . . . . . . . 153
Hill Start Assist (HSA) . . . . . . . . . . 242
Hood . . . . . . . . . . . . . . . . . . . . . . . . . . . 314
Horn . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131
How to Wear Seat Belts
Properly . . . . . . . . . . . . . . . . . . . . . . . . 80
HVAC . . . . . . . . . . . . . . . . . . . . . . 188, 190
I Ignition Positions . . . . . . . . . . 217, 219
Ignition Transmission Lock
Check . . . . . . . . . . . . . . . . . . . . . . . . . 343
Immobilizer . . . . . . . . . . . . . . . . . . . . . . 55
Indicator
Pedestrian Ahead . . . . . . . . . . . . 154
Vehicle Ahead . . . . . . . . . . . . . . . . 154
Infants and Young Children,
Restraints . . . . . . . . . . . . . . . . . . . . . 100
Information
Publication Ordering . . . . . . . . . . 442
Infotainment . . . . . . . . . . . . . . . . . . . . 187
Infotainment System . . . . . . . . . . . . 446
Instrument Cluster . . . . . . . . . . . . . . 138
Interior Rearview Mirrors . . . . . . . . . 60
Introduction . . . . . . . . . . . . . . . . . . . . . . . 2 J Jump Starting - North
America . . . . . . . . . . . . . . . . . . . . . . . 395
K Keyless Entry
Remote (RKE) System . . . . . 33, 41
Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
L Labeling, Tire Sidewall . . . . . . . . . . 360
Lamps
Daytime Running (DRL) . . . . . . 179
Dome . . . . . . . . . . . . . . . . . . . . . . . . . 183
Exterior Cargo . . . . . . . . . . . . . . . . 182
Exterior Controls . . . . . . . . . . . . . . 176
Exterior Lamps Off
Reminder . . . . . . . . . . . . . . . . . . . 178
Exterior Lighting Battery
Saver . . . . . . . . . . . . . . . . . . . . . . . 185
License Plate . . . . . . . . . . . . . . . . . 349
Malfunction Indicator
(Check Engine) . . . . . . . . . . . . . 149
On Reminder . . . . . . . . . . . . . . . . . 158
Reading . . . . . . . . . . . . . . . . . . . . . . 184
Lane Change Alert (LCA) . . . . . . . 267
Lane Departure
Warning (LDW) . . . . . . . . . . . . . . . . 269
Lane Keep Assist (LKA) . . . . . . . . 269

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/-
Mexico-1500-11698638) - 2019 - crc - 5/16/18
Index 467Power (cont'd)
Mirrors . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Outlets . . . . . . . . . . . . . . . . . . . . . . . 132
Protection, Battery . . . . . . . . . . . . 185
Retained Accessory (RAP) . . . 225
Seat Adjustment . . . . . . . . . . . . . . . . 70
Windows . . . . . . . . . . . . . . . . . . . . . . . 63
Power Assist Steps . . . . . . . . . . . . . . 52
Pregnancy, Using Seat Belts . . . . 84
Privacy
Vehicle Data Recording . . . . . . . 445
Program
Courtesy Transportation . . . . . . 439
Prohibited Fuels . . . . . . . . . . . . . . . . 272
Proposition
65 Warning,
California . . . . . . . . . . . .313, 337, 395,
Back Cover
Publication Ordering
Information . . . . . . . . . . . . . . . . . . . . 442
R Radio Frequency Statement . . . . 443
Reading Lamps . . . . . . . . . . . . . . . . . 184
Rear Axle . . . . . . . . . . . . . . . . . . . . . . . 341
Locking . . . . . . . . . . . . . . . . . . . . . . . 250
Rear Camera Mirror . . . . . . . . . . . . . 60
Rear Seats . . . . . . . . . . . . . . . . . . . . . . 77 Rear Seats (cont'd)
Heated . . . . . . . . . . . . . . . . . . . . . . . . . 78
Rear Storage . . . . . . . . . . . . . . . . . . . 126
Rear Vision Camera (RVC) . . . . . 254
Rear Windows . . . . . . . . . . . . . . . . . . . 65
Rearview Mirrors . . . . . . . . . . . . . . . . 60
Automatic Dimming . . . . . . . . . . . . . 60
Reclining Seatbacks . . . . . . . . . . . . . 71
Recommended
Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . 271
Recommended Fluids and
Lubricants . . . . . . . . . . . . . . . . . . . . . 425
Records
Maintenance . . . . . . . . . . . . . . . . . . 428
Recreational Vehicle Towing . . . . 399
Reimbursement Program,
GM Mobility . . . . . . . . . . . . . . . . . . . 437
Remote Keyless Entry
(RKE) System . . . . . . . . . . . . . . 33, 41
Remote Vehicle Start . . . . . . . . . . . . 43
Replacement Parts
Airbags . . . . . . . . . . . . . . . . . . . . . . . . . 98
Maintenance . . . . . . . . . . . . . . . . . . 427
Replacing Airbag System . . . . . . . . 98
Replacing LATCH System
Parts after a Crash . . . . . . . . . . . . 117
Replacing Seat Belt System
Parts after a Crash . . . . . . . . . . . . . 85 Reporting Safety Defects
Canadian Government . . . . . . . . 444
General Motors . . . . . . . . . . . . . . . 444
U.S. Government . . . . . . . . . . . . . 443
Restraints
Where to Put . . . . . . . . . . . . . . . . . 104
Retained Accessory
Power (RAP) . . . . . . . . . . . . . . . . . . 225
Reverse Tilt Mirrors . . . . . . . . . . . . . . 59
Ride Control Systems
Enhanced Traction
System (ETS) . . . . . . . . . . . . . . . 250
Roads
Driving, Wet . . . . . . . . . . . . . . . . . . 205
Roadside Assistance
Program . . . . . . . . . . . . . . . . . . . . . . . 437
Roof
Sunroof . . . . . . . . . . . . . . . . . . . . . . . . . 65
Rotation, Tires . . . . . . . . . . . . . . . . . . 376
Routing, Engine Drive Belt . . . . . . 432
Running the Vehicle While
Parked . . . . . . . . . . . . . . . . . . . . . . . . 229
S Safety Defects Reporting
Canadian Government . . . . . . . . 444
General Motors . . . . . . . . . . . . . . . 444

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/-
Mexico-1500-11698638) - 2019 - crc - 5/16/18
468 Index Safety Defects Reporting (cont'd)
U.S. Government . . . . . . . . . . . . . 443
Safety Locks . . . . . . . . . . . . . . . . . . . . . 46
Safety System Check . . . . . . . . . . . . 84
Scheduling Appointments . . . . . . . 439
Seat Belts . . . . . . . . . . . . . . . . . . . . . . . 79
Care . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
Extender . . . . . . . . . . . . . . . . . . . . . . . . 84
How to Wear Seat Belts
Properly . . . . . . . . . . . . . . . . . . . . . . . 80
Lap-Shoulder Belt . . . . . . . . . . . . . . 82
Reminders . . . . . . . . . . . . . . . . . . . . 146
Replacing after a Crash . . . . . . . . 85
Use During Pregnancy . . . . . . . . . . 84
Seats
Adjustment, Front . . . . . . . . . . . . . . . 69
Center Seat . . . . . . . . . . . . . . . . . . . . 70
Head Restraints . . . . . . . . . . . . . . . . 68
Heated and Ventilated Front . . . . 75
Heated, Rear . . . . . . . . . . . . . . . . . . . 78
Lumbar Adjustment, Front . . . . . . 71
Memory . . . . . . . . . . . . . . . . . . . . . . . . . 73
Power Adjustment, Front . . . . . . . 70
Rear . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
Reclining Seatbacks . . . . . . . . . . . . 71
Underseat Storage . . . . . . . . . . . 126
Securing Child
Restraints . . . . . . . . . . . 117, 120, 121 Security
Light . . . . . . . . . . . . . . . . . . . . . . . . . . 157
OnStar . . . . . . . . . . . . . . . . . . . . . . . 449
Vehicle . . . . . . . . . . . . . . . . . . . . . . . . . 54
Vehicle Alarm . . . . . . . . . . . . . . . . . . . 54
Service . . . . . . . . . . . . . . . . . . . . . . . . . 195
Accessories and
Modifications . . . . . . . . . . . . . . . . 313
Climate Control System . . . . . . . 188
Doing Your Own Work . . . . . . . . 314
Maintenance Records . . . . . . . . 428
Maintenance, General
Information . . . . . . . . . . . . . . . . . . 413
Parts Identification Label . . . . . 429
Scheduling Appointments . . . . . 439
Service Electric Parking
Brake Light . . . . . . . . . . . . . . . . . . . . 152
Services
Special Application . . . . . . . . . . . 421
Servicing the Airbag . . . . . . . . . . . . . 96
Shifting
Into Park . . . . . . . . . . . . . . . . . . . . . . 225
Out of Park . . . . . . . . . . . . . . . . . . . 227
Side Blind Zone Alert (SBZA) . . . 267
Signals, Turn and
Lane-Change . . . . . . . . . . . . . . . . . 181
Snow Plow . . . . . . . . . . . . . . . . . . . . . 307
Special Application Services . . . . 421 Specifications and
Capacities . . . . . . . . . . . . . . . . . . . . . 430
Speedometer . . . . . . . . . . . . . . . . . . . 142
Start Assist, Hill . . . . . . . . . . . . . . . . . 242
Start Vehicle, Remote . . . . . . . . . . . 43
Starter Switch Check . . . . . . . . . . . 343
Starting the Engine . . . . . . . . . . . . . 221
Steering . . . . . . . . . . . . . . . . . . . . . . . . 199
Heated Wheel . . . . . . . . . . . . . . . . 131
Wheel Adjustment . . . . . . . . . . . . 130
Wheel Controls . . . . . . . . . . . . . . . 131
Steps
Power Assist . . . . . . . . . . . . . . . . . . . 52
Stop/Start System . . . . . . . . . . . . . . 222
Stoplamps and Back-up Lamps
Bulb Replacement . . . . . . . . . . . . 347
Storage
Rear . . . . . . . . . . . . . . . . . . . . . . . . . . 126
Storage Areas
Center Console . . . . . . . . . . . . . . . 126
Floor Console . . . . . . . . . . . . . . . . 127
Glove Box . . . . . . . . . . . . . . . . . . . . 125
Underseat . . . . . . . . . . . . . . . . . . . . 126
Storage Compartments . . . . . . . . . 125
Struts
Gas . . . . . . . . . . . . . . . . . . . . . . . . . . . 345
Stuck Vehicle . . . . . . . . . . . . . . . . . . . 208
Sun Visors . . . . . . . . . . . . . . . . . . . . . . . 65

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/-
Mexico-1500-11698638) - 2019 - crc - 5/16/18
470 Index Turn Signal
Bulb Replacement . . . . . . . . . . . . 347
U Underseat Storage . . . . . . . . . . . . . 126
Uniform Tire Quality Grading . . . 380
Universal Remote System . . . . . . 172
Operation . . . . . . . . . . . . . . . . . . . . . 175
Programming . . . . . . . . . . . . . . . . . 172
Using This Manual . . . . . . . . . . . . . . . . 2
V Vehicle
Alarm System . . . . . . . . . . . . . . . . . . 54
Canadian Owners . . . . . . . . . . . . . . . 2
Control . . . . . . . . . . . . . . . . . . . . . . . 198
Identification Number (VIN) . . . 429
Load Limits . . . . . . . . . . . . . . . . . . . 209
Messages . . . . . . . . . . . . . . . . . . . . 166
Personalization . . . . . . . . . . . . . . . 167
Remote Start . . . . . . . . . . . . . . . . . . . 43
Security . . . . . . . . . . . . . . . . . . . . . . . . 54
Speed Messages . . . . . . . . . . . . . 167
Towing . . . . . . . . . . . . . . . . . . . . . . . . 398
Vehicle Ahead Indicator . . . . . . . . 154
Vehicle Care
Tire Pressure . . . . . . . . . . . . . . . . . 367
Vehicle Data Recording and
Privacy . . . . . . . . . . . . . . . . . . . . . . . . 445 Ventilation, Air . . . . . . . . . . . . . . . . . . 194
Visors . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Voltmeter Gauge . . . . . . . . . . . . . . . 146
W Warning
Brake System Light . . . . . . . . . . . 151
Caution and Danger . . . . . . . . . . . . . 2
Lane Departure (LDW) . . . . . . . 269
Warning Lights, Gauges, and
Indicators . . . . . . . . . . . . . . . . . . . . . 137
Warnings
Hazard Flashers . . . . . . . . . . . . . . 180
Washer Fluid . . . . . . . . . . . . . . . . . . . 334
Wheels
Alignment and Tire Balance . . 381
Different Size . . . . . . . . . . . . . . . . . 379
Replacement . . . . . . . . . . . . . . . . . 381
When It Is Time for New
Tires . . . . . . . . . . . . . . . . . . . . . . . . . . 377
Where to Put the Restraint . . . . . 104
Windows . . . . . . . . . . . . . . . . . . . . . . . . 62
Manual . . . . . . . . . . . . . . . . . . . . . . . . . 63
Power . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Rear . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Windshield
Replacement . . . . . . . . . . . . . . . . . 345
Wiper/Washer . . . . . . . . . . . . . . . . 131 Winter
Driving . . . . . . . . . . . . . . . . . . . . . . . . 206
Winter Tires . . . . . . . . . . . . . . . . . . . . 359
Wiper Blade Replacement . . . . . . 344
Wireless Charging . . . . . . . . . . . . . . 135