
GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-9955992) - 2017 - crc - 4/18/17
488 OnStar
OnStar
OnStar Overview
OnStar Overview . . . . . . . . . . . . . 488
OnStar Services
Emergency . . . . . . . . . . . . . . . . . . . 489
Security . . . . . . . . . . . . . . . . . . . . . . 489
Navigation . . . . . . . . . . . . . . . . . . . . 490
Connections . . . . . . . . . . . . . . . . . . 491
Diagnostics . . . . . . . . . . . . . . . . . . . 492
OnStar Additional Information
OnStar AdditionalInformation . . . . . . . . . . . . . . . . . . 493
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
subscription 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 ’s Terms &Conditions and Privacy Statement
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. PressQ
twice to speak with an OnStar
Advisor.
Press
Qor call 1-888-4ONSTAR
(1-888-466-7827) to speak to an
Advisor.
Press
=to:
. Make a call, end a call,
or answer an incoming call.
. Give OnStar Hands-Free Calling
voice commands.
. Give OnStar Turn-by-Turn
Navigation voice commands.

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-9955992) - 2017 - crc - 4/18/17
OnStar 489
.Obtain the Wi-Fi®hotspot name
or SSID and password,
if equipped.
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.
Press
>to get a priority connection
to an OnStar Advisor available
24/7 to:
. Get help for an emergency.
. Be a Good Samaritan or
respond to an AMBER Alert.
. Get assistance in severe
weather or other crisis situations
and find evacuation routes.
OnStar Services
Emergency
Emergency Services require an
active, OnStar service plan
(excludes Basic Plan). With
Automatic Crash Response, built-in
sensors can automatically alert a
specially trained OnStar Advisor
who is immediately connected in to
the vehicle to help.
Press
>for a priority connection to
an OnStar Advisor who can contact
emergency service providers, direct
them to your exact location, and
relay important information.
With OnStar Crisis Assist, specially
trained Advisors are available
24 hours a day, 7 days a week, to
provide a central point of contact,
assistance, and information during a
crisis.
With Roadside Assistance, Advisors
can locate a nearby service provider
to help with a flat tire, a battery
jump, or an empty gas tank.
Security
If equipped, OnStar provides these
services:
. With Stolen Vehicle Assistance,
OnStar Advisors can use GPS to
pinpoint the vehicle and help
authorities quickly recover it.
. With Remote Ignition Block,
if equipped, OnStar can block
the engine from being restarted.
. With Stolen Vehicle Slowdown,
if equipped, OnStar can work
with law enforcement to
gradually slow the vehicle down.
Theft Alarm Notification
If equipped, if the doors are locked
and the vehicle alarm sounds, a
notification by text, e-mail, or phone
call will be sent. If the vehicle is
stolen, an OnStar Advisor can work
with authorities to recover the
vehicle.

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-9955992) - 2017 - crc - 4/18/17
OnStar 495
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
Qto 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 0350. 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,
security, or the operation of the
vehicle or the vehicle systems.
Software updates or changes may
affect or erase data or settings that
are stored in the vehicle, such as
OnStar Hands-Free Calling name
tags, saved navigation destinations,
or pre-set radio stations. Neither
OnStar nor GM is responsible for
any affected or erased data or settings. These updates or changes
may also collect personal
information. Such collection is
described in the OnStar privacy
statement or separately disclosed at
the time of installation. These
updates or changes may also cause
a system to automatically
communicate with GM servers to
collect information about vehicle
system status, identify whether
updates or changes are available,
or deliver updates or changes. An
active OnStar agreement constitutes
consent to these software updates
or changes and agreement that
either OnStar or GM may remotely
deliver them to the vehicle.
Privacy
The complete OnStar Privacy
Statement may be found at
www.onstar.com (U.S.),
or www.onstar.ca (Canada). We
recommend that you review it. If you
have any questions, call
1-888-4ONSTAR (1-888-466-7827)
or press
Qto speak with an
Advisor. Users of wireless
communications are cautioned that

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-9955992) - 2017 - crc - 4/18/17
Index 499
Antilock Brake System(ABS) (cont'd)
Warning Light . . . . . . . . . . . . . . . . . 146
Appearance Care
Exterior . . . . . . . . . . . . . . . . . . . . . . . 444
Interior . . . . . . . . . . . . . . . . . . . . . . . . 449
Apple CarPlay and Android Auto . . . . . . . . . . . . . . . . . . 237
Assistance Program,
Roadside . . . . . . . . . . . . . . . . . . . . . . 478
Assistance Systems for Driving . . . . . . . . . . . . . . . . . . . . . . . . 308
Assistance Systems for
Parking and Backing . . . . . . . . . . 306
Audio Bluetooth . . . . . . . . . . . . . . . . . . . . . 215
Theft-Deterrent Feature . . . . . . . 189
Audio Players
CD . . . . . . . . . . . . . . . . . . . . . . . . . . . 203
Automatic Dimming Mirrors . . . . . . . . . . . . . . . . 49
Door Locks . . . . . . . . . . . . . . . . . . . . . 40
Forward Braking . . . . . . . . . . . . . . 310
Headlamp System . . . . . . . . . . . . 181
Transmission . . . . . . . . . . . . . . . . . 283
Transmission Fluid . . . . . . 368, 371
Automatic Transmission
Manual Mode . . . . . . . . . . . . . . . . . 286 Automatic Transmission (cont'd)
Shift Lock Control Function
Check . . . . . . . . . . . . . . . . . . . . . . . 387
Auxiliary
Roof Mounted Lamp . . . . . . . . . . 183
Auxiliary Jack . . . . . . . . . . . . . . . . . . . 214
Axle, Front . . . . . . . . . . . . . . . . . . . . . . 384
Axle, Rear . . . . . . . . . . . . . . . . . . . . . . 385
B
Battery Load Management . . . . . . . . . . . . 186
Power Protection . . . . . . . . . . . . . 187
Voltage and ChargingMessages . . . . . . . . . . . . . . . . . . . 157
Battery - North America . . . . 383, 435
Blade Replacement, Wiper . . . . . 388
Blind Spot Mirrors . . . . . . . . . . . . . . . 49
Bluetooth Overview . . . . . . . . 222, 224, 228, 233
Bluetooth Audio . . . . . . . . . . . . . . . . 215
Brake
Pedal and AdjustableThrottle . . . . . . . . . . . . . . . . . . . . . . 273
System Warning Light . . . . . . . . 145
Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . 381 Antilock . . . . . . . . . . . . . . . . . . . . . . . 297
Assist . . . . . . . . . . . . . . . . . . . . . . . . . 298 Brakes (cont'd)
Fluid . . . . . . . . . . . . . . . . . . . . . . . . . . 381
Parking . . . . . . . . . . . . . . . . . . . . . . . 297
System Messages . . . . . . . . . . . . 158
Braking . . . . . . . . . . . . . . . . . . . . . . . . . 254 Automatic Forward . . . . . . . . . . . 310
Break-In, New Vehicle . . . . . . . . . . 273
Bulb Replacement . . . . . . . . . . . . . . 392 Center High-Mounted
Stoplamp (CHMSL) and
Cargo Lamp . . . . . . . . . . . . . . . . . 391
Halogen Bulbs . . . . . . . . . . . . . . . . 389
Headlamp Aiming . . . . . . . . . . . . . 389
Headlamps . . . . . . . . . . . . . . . . . . . 389
High Intensity Discharge (HID) Lighting . . . . . . . . . . . . . . . 390
Taillamps, Turn Signal, Stoplamps, and Back-up
Lamps . . . . . . . . . . . . . . . . . . . . . . 390
Buying New Tires . . . . . . . . . . . . . . . 418
C
Calibration . . . . . . . . . . . . . . . . . . . . . . 126
California Fuel Requirements . . . . . . . . . . . 316

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-9955992) - 2017 - crc - 4/18/17
Index 505
Maintenance Schedule (cont'd)Recommended Fluids and
Lubricants . . . . . . . . . . . . . . . . . . . 464
Transfer Case . . . . . . . . . . . . . . . . 289
Malfunction Indicator Lamp . . . . . 144
Manual Mirrors . . . . . . . . . . . . . . . . . . 46
Manual Mode . . . . . . . . . . . . . . . . . . . 286
Manual Windows . . . . . . . . . . . . . . . . 51
Memory Features . . . . . . . . . . . . . . . . 12
Memory Seats . . . . . . . . . . . . . . . . . . . 60
Messages Airbag System . . . . . . . . . . . . . . . . 162
Battery Voltage andCharging . . . . . . . . . . . . . . . . . . . . 157
Brake System . . . . . . . . . . . . . . . . 158
Compass . . . . . . . . . . . . . . . . . . . . . 158
Door Ajar . . . . . . . . . . . . . . . . . . . . . 158
Engine Cooling System . . . . . . . 159
Engine Oil . . . . . . . . . . . . . . . . . . . . 159
Engine Power . . . . . . . . . . . . . . . . 160
Fuel System . . . . . . . . . . . . . . . . . . 160
Key and Lock . . . . . . . . . . . . . . . . . 160
Lamp . . . . . . . . . . . . . . . . . . . . . . . . . 160
Object Detection System . . . . . 161
Ride Control System . . . . . . . . . . 161
Safety Belt . . . . . . . . . . . . . . . . . . . . 163
Security . . . . . . . . . . . . . . . . . . . . . . 163
Steering System . . . . . . . . . . . . . . 163 Messages (cont'd)
Tire . . . . . . . . . . . . . . . . . . . . . . . . . . . 164
Transmission . . . . . . . . . . . . . . . . . 164
Vehicle . . . . . . . . . . . . . . . . . . . . . . . 157
Vehicle Reminder . . . . . . . . . . . . . 166
Vehicle Speed . . . . . . . . . . . . . . . . 167
Washer Fluid . . . . . . . . . . . . . . . . . 167
Mirrors Automatic Dimming . . . . . . . . . . . . . 49
Automatic Dimming
Rearview . . . . . . . . . . . . . . . . . . . . . . 50
Blind Spot . . . . . . . . . . . . . . . . . . . . . . 49
Convex . . . . . . . . . . . . . . . . . . . . . . . . . 46
Folding . . . . . . . . . . . . . . . . . . . . . . . . . 48
Heated . . . . . . . . . . . . . . . . . . . . . . . . . 48
Manual . . . . . . . . . . . . . . . . . . . . . . . . . 46
Manual Rearview . . . . . . . . . . . . . . . 50
Power . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Tilt in Reverse . . . . . . . . . . . . . . . . . . 50
Trailer Tow . . . . . . . . . . . . . . . . . . . . . . 46
Mirrors, Interior Rearview . . . . . . . . 50
Monitor System, Tire Pressure . . . . . . . . . . . . . . . . . . . . . . 410
Multi-band Antenna . . . . . . . . . . . . . 203N
Navigation OnStar®. . . . . . . . . . . . . . . . . . . . . . 490
New Vehicle Break-In . . . . . . . . . . . 273
Noise Control System . . . . . . . . . . 386
O
Object Detection System Messages . . . . . . . . . . . . . . . . . . . . . 161
Odometer . . . . . . . . . . . . . . . . . . . . . . . 136 Trip . . . . . . . . . . . . . . . . . . . . . . . . . . . 136
Off-Road . . . . . . . . . . . . . . . . . . . . . . . 257 Driving . . . . . . . . . . . . . . . . . . . . . . . . 257
Recovery . . . . . . . . . . . . . . . . . . . . . 256
Oil
Engine . . . . . . . . . . . . . . . . . . . . . . . . 364
Engine Oil Life System . . . . . . . 367
Engine Oil Pressure Gauge . . . 137
Messages . . . . . . . . . . . . . . . . . . . . 159
Pressure Light . . . . . . . . . . . . . . . . 150
Older Children, Restraints . . . . . . . 87
Online Owner Center . . . . . . . . . . . 477
OnStar . . . . . . . . . . . . . . . . . . . . . . . . . 486
OnStar
®Additional
Information . . . . . . . . . . . . . . . . . . . . 493
OnStar
®Connections . . . . . . . . . . . 491
OnStar®Diagnostics . . . . . . . . . . . . 492
OnStar®Emergency . . . . . . . . . . . . 489
OnStar®Navigation . . . . . . . . . . . . . 490

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-9955992) - 2017 - crc - 4/18/17
506 Index
OnStar®Overview . . . . . . . . . . . . . . 488
OnStar®Security . . . . . . . . . . . . . . . 489
Operating Mode Overheated EngineProtection . . . . . . . . . . . . . . . . . . . 378
Operation Fog Lamps . . . . . . . . . . . . . . . . . . . 183
Ordering Service Publications . . . . . . . . . . 483
Outlets Power . . . . . . . . . . . . . . . . . . . . . . . . 128
Overheated Engine Protection Operating Mode . . . . 378
Overheating, Engine . . . . . . . . . . . . 376
Overview . . . . . . . . . . . . . . . . . . 189, 193
P
Park Shifting Into . . . . . . . . . . . . . . . . . . . 279
Shifting Out of . . . . . . . . . . . . . . . . 280
Parking
Brake . . . . . . . . . . . . . . . . . . . . . . . . . 297
Brake and P (Park)Mechanism Check . . . . . . . . . . 388
Over Things That Burn . . . . . . . 281
Parking Assist . . . . . . . . . . . . . . . . . . 306
Parking or Backing
Assistance Systems . . . . . . . . . . 306 Passenger Airbag Status
Indicator . . . . . . . . . . . . . . . . . . . . . . 143
Passenger Compartment Air Filter . . . . . . . . . . . . . . . . . . . . . . . . . . 250
Passenger Sensing System . . . . . 81
Perchlorate Materials Requirements, California . . . . . . 357
Personalization Vehicle . . . . . . . . . . . . . . . . . . . . . . . 167
Phone Apple CarPlay and
Android Auto . . . . . . . . . . . . . . . . 237
Bluetooth . . . . . . . . 222, 224, 228, 233
Pickup Conversion to
Chassis Cab . . . . . . . . . . . . . . . . . . 354
Port USB . . . . . . . . . . . . . . . . . . . . . 206, 208
Power Door Locks . . . . . . . . . . . . . . . . . . . . . 40
Mirrors . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Outlets . . . . . . . . . . . . . . . . . . . . . . . 128
Protection, Battery . . . . . . . . . . . . 187
Retained Accessory (RAP) . . . 277
Seat Adjustment . . . . . . . . . . . . . . . . 58
Steering Fluid . . . . . . . . . . . . . . . . . 379
Windows . . . . . . . . . . . . . . . . . . . . . . . 51
Power Assist Steps . . . . . . . . . . . . . . 42 Pregnancy, Using Safety Belts . . . 70
Privacy
Vehicle Data Recording . . . . . . . 485
Program Courtesy Transportation . . . . . . 480
Proposition 65 Warning,
California . . . . . . . . . . . .357, 383, 435
R
Radio Frequency Statement . . . . 484
Radio Reception . . . . . . . . . . . . . . . . 202
Radios
AM-FM Radio . . . . . . . . . . . . 197, 199
Satellite . . . . . . . . . . . . . . . . . . 200, 201
Reading Lamps . . . . . . . . . . . . . . . . . 185
Rear Axle . . . . . . . . . . . . . . . . . . . . . . . 385 Locking . . . . . . . . . . . . . . . . . . . . . . . 302
Rear Seats . . . . . . . . . . . . . . . . . . 63, 64
Rear Vision Camera (RVC) . . . . . 306
Rear Windows . . . . . . . . . . . . . . . . . . . 53
Rearview Mirrors . . . . . . . . . . . . . . . . 50 Automatic Dimming . . . . . . . . . . . . . 50
Reclining Seatbacks . . . . . . . . . . . . . 59
Recognition Voice . . . . . . . . . . . . . . . . . . . . . . . . . 216
Recommended Fluids and Lubricants . . . . . . . . . . . . . . . . . . . . . 464