service GMC SIERRA 2015 Owner's Manual

Black plate (14,1)GMC 2015i Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-8431500) - 2015 - crc - 6/20/14
13-14 Customer Information
In Canada, call 1-800-263-3777
(English) or 1-800-263-7854
(French), or write:
General Motors of Canada Limited
Customer Care Centre, Mail Code:
CA1-163-005
1908 Colonel Sam Drive
Oshawa, Ontario L1H 8P7Vehicle Data
Recording and
Privacy
The vehicle has a number of
computers that record information
about the vehicle’s performance and
how it is driven. 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.
Some modules may also store data
about how the vehicle is operated,
such as rate of fuel consumption or
average speed. These modules may
retain personal preferences, such as
radio presets, seat positions, and
temperature settings.
Event Data Recorders
This vehicle is equipped with an
event data recorder (EDR). The
main purpose of an EDR is to
record, in certain crash or near
crash-like situations, such as an air
bag deployment or hitting a road
obstacle, data that will assist in
understanding how a vehicle’s
systems performed. The EDR is
designed to record data related to
vehicle dynamics and safety
systems for a short period of time,
typically 30 seconds or less. The
EDR in this vehicle is designed to
record such data as:
.How various systems in your
vehicle were operating;
.Whether or not the driver and
passenger safety belts were
buckled/fastened;
.How far (if at all) the driver was
depressing the accelerator and/
or brake pedal; and,
.How fast the vehicle was
traveling.

Black plate (1,1)GMC 2015i Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-8431500) - 2015 - crc - 6/20/14
OnStar 14-1
OnStar
OnStar Overview
OnStar Overview . . . . . . . . . . . . 14-1
OnStar Services
Emergency . . . . . . . . . . . . . . . . . . 14-2
Security . . . . . . . . . . . . . . . . . . . . . . 14-3
Navigation . . . . . . . . . . . . . . . . . . . 14-3
Connections . . . . . . . . . . . . . . . . . 14-4
Vehicle Diagnostics . . . . . . . . . . 14-6
OnStar Additional Information
OnStar AdditionalInformation . . . . . . . . . . . . . . . . . 14-6
OnStar Overview
=Voice Command Button
QBlue OnStar Button
>Emergency Button
This vehicle may be equipped with a
comprehensive, in-vehicle system
that can connect to a live OnStar
Advisor for Emergency, Security,
Navigation, Connection, and
Diagnostic Services. OnStar
services may require a paid
subscription. 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 public emergency service
providers. OnStar may collect
information about you and your vehicle, including location
information. See OnStar
’s Terms
and 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 on.
.Flashing Green: On a call.
.Red: Indicates a problem.
.Off: System is off. Press the blue
OnStar button twice to speak
with an OnStar Advisor.
Press
Qor call 1-888-4-ONSTAR
(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.

Black plate (2,1)GMC 2015i Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-8431500) - 2015 - crc - 6/20/14
14-2 OnStar
.Give OnStar Turn-by-Turn
Navigation voice commands.
Requires a specific OnStar
subscription plan.
.Obtain the WiFi network name,
or Service Set Identifier or SSID,
and passphrase (if equipped).
Press
Qto connect to a live
Advisor to:
.Verify account information or
update contact information.
.Get driving directions. Requires
a specific OnStar
subscription plan..
.Receive On-Demand
Diagnostics for a check of the
vehicle’s key operating systems.
.Receive Roadside Assistance.
.Manage WiFi Settings (if
equipped). Press
>to get a priority connection
to an OnStar Emergency 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 and
evacuation routes.
OnStar Services
Emergency
With Automatic Crash Response,
the OnStar system can
automatically connect to an OnStar
Emergency Advisor. The built-in
system can automatically connect to
help in certain crashes.
Press
>to connect to an OnStar
Emergency Advisor. GPS
technology is used to identify the
vehicle location and can provide
important information to emergency
personnel. OnStar Emergency
Advisors are trained to provide
assistance and link to existing
public emergency service providers
in emergency situations.
With OnStar Crisis Assist, specially
trained Crisis Advisors are available
24 hours a day, 7 days a week, to
provide a central point of contact,
assistance, and information if a
crisis occurs.

Black plate (3,1)GMC 2015i Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-8431500) - 2015 - crc - 6/20/14
OnStar 14-3
Security
OnStar provides services including
Stolen Vehicle Assistance, Remote
Ignition Block, and Roadside
Assistance, if equipped. OnStar can
unlock the vehicle doors remotely,
if equipped with automatic door
locks, and can help police locate the
vehicle if it is stolen.
Navigation
OnStar navigation requires a
specific OnStar subscription plan.
Press
Qto receive directions or
have them sent to the vehicle
navigation screen, if equipped.
Destinations can also be forwarded
to the vehicle from MapQuest.com.
Turn-by-Turn Navigation
1. PressQto connect to a live
Advisor.
2. Request directions.
3. Directions are downloaded to the vehicle. 4. Follow the voice-guided
commands.
Using Voice Commands
During a Planned Route
Cancel Route
1. Press
=. System responds:
“OnStar ready,” then a tone. Say
“Cancel route.” System
responds: “Do you want to
cancel directions?”
2. Say “Yes.”System responds:
“OK, request completed, thank
you, goodbye.”
Route Preview
1. Press
=. System responds:
“OnStar ready,” then a tone.
2. Say “Route preview.” System
responds with the next three
maneuvers.
Repeat
1. Press
=. System responds:
“OnStar ready,” then a tone. 2. Say
“Repeat.” System responds
with the last direction given, then
responds with “OnStar ready,”
then a tone.
Get My Destination
1. Press
=. System responds:
“OnStar ready,” then a tone.
2. Say “Get my destination.”
System responds with the
address and the distance to the
destination, then responds with
“OnStar ready,” then a tone.
Other Navigation Services
Available from OnStar
OnStar eNav:Subscribers can
send destinations from
MapQuest.com to the vehicle
Turn-by-Turn Navigation or
screen-based navigation system (if
equipped). When ready, the
directions will be downloaded to the
vehicle.
Destination Download: Press
Q,
then request the Advisor to
download directions to the

Black plate (4,1)GMC 2015i Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-8431500) - 2015 - crc - 6/20/14
14-4 OnStar
navigation system in the vehicle (if
equipped). After the call ends, press
the“Go” button on the navigation
screen to begin driving directions.
If directions are downloaded to the
navigation system, the route can
only be canceled through the
navigation system.
Destinations can also be
downloaded on the go. For
information about eNav or
Destination Download, see
www.onstar.com (U.S.) or
www.onstar.ca (Canada).
Connections
The required specific Onstar
subscription plan includes the
services that follow to help
customers stay connected.
For coverage maps, see
www.onstar.com (U.S.) or
www.onstar.ca (Canada). WiFi Connectivity (If Equipped)
The vehicle has a WiFi hotspot that
provides a high-speed, wireless
Internet connection to connect
multiple mobile devices (data plan
required).
1. To retrieve WiFi hotspot
information, press
=and select
or say “WiFi settings.”
2. The WiFi settings will display the WiFi network name/SSID,
passphrase, and level of
encryption.
3. To change the SSID or passphrase, press
Qor call
1-888-4-ONSTAR to connect
with an Advisor.
OnStar RemoteLink
®Mobile App
(If Equipped)
Download the OnStar RemoteLink
mobile app to select Apple
®,
Android™, and BlackBerry®or
Windows 7 or 8 mobile devices.
From the mobile device, check the
vehicle’s fuel level, oil life, or tire pressure (if the vehicle is equipped
with the tire pressure monitoring
system); or activate remote horn
and lights. Also remote start the
vehicle (if factory equipped) or
unlock the doors from anywhere
with a wireless connection (if
equipped with automatic locks).
With a required specific OnStar
subscription plan, a destination can
be sent to the vehicle. For OnStar
RemoteLink information and
compatibility, see www.onstar.com
(U.S.) or www.onstar.ca (Canada).
OnStar RemoteLink
®Key Fob
Services
This feature is included for five
years and allows for remote door
lock/unlock (if equipped with
automatic locks), remote start (if
factory equipped), or activation of
horn and lights from anywhere with
a wireless signal. Download the app
and start using it any time during the
trial period to get started.

Black plate (5,1)GMC 2015i Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-8431500) - 2015 - crc - 6/20/14
OnStar 14-5
OnStar Hands-Free Calling
This service allows calls to be made
and received from the vehicle.
To Make a Call
1. Press
=. System responds:
“OnStar ready.”
2. Say “Call.”System responds:
“Call. Please say the name or
number to call.”
3. Say the entire number without pausing, including a “1”and the
area code. System responds:
“OK calling.”
Calling 911 Emergency
1. Press=. System responds:
“OnStar Ready,” followed by
a tone.
2. Say “Call.”System responds:
“Call. Please say the name or
number to call.”
3. Say “911”without pausing.
System responds: “911.”4. Say
“Call.”System responds:
“OK, dialing 911.”
Retrieve My Number
1. Press=. System responds:
“OnStar ready.”
2. Say “My number.” System
responds: “Your OnStar
Hands-Free Calling number is,”
then says the number.
End a Call
Press=. System responds: “Call
ended.”
Store a Name Tag for Speed
Dialing
1. Press=. System responds:
“OnStar ready.”
2. Say “Store.” System responds:
“Please say the number you
would like to store.” 3. Say the entire number without
pausing. System responds:
“Please say the name tag.”
4. Pick a name tag. System responds: “About to store tag>. Does that sound OK?”
5. Say “Yes”or say “No”to try
again. System responds: “OK,
storing .”
Place a Call Using a Stored
Number
1. Press=. System responds:
“OnStar ready.”
2. Say “Call .” System
responds: “OK, calling
.”
Verify Minutes and Expiration
Press=and say “Minutes” then
“Verify” to check how many minutes
remain and their expiration date.

Black plate (6,1)GMC 2015i Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-8431500) - 2015 - crc - 6/20/14
14-6 OnStar
Vehicle Diagnostics
OnStar Vehicle Diagnostics can
perform a vehicle check every
month. It will check the engine,
transmission, antilock brakes, and
other major vehicle systems. It also
checks the tire pressures, if the
vehicle is equipped with the Tire
Pressure Monitoring System. If an
On-Demand Diagnostics check is
needed, press
Q, and an Advisor
can run a check.
OnStar Additional
Information
Transferring Service
PressQto request account transfer
eligibility information. The Advisor
can assist in canceling or removing
account information.
Selling/Transferring the
Vehicle
Call 1-888-4-ONSTAR immediately
to terminate your OnStar services if
the vehicle is disposed of, sold,
transferred, or if the lease ends.
Reactivation for Subsequent
Owners
PressQand follow the prompts to
speak to an Advisor as soon as
possible. The Advisor will update
vehicle records and explain the
OnStar service options available.
How OnStar Service Works
Automatic Crash Response,
Emergency Services, Crisis Assist,
Stolen Vehicle Assistance, Vehicle
Diagnostics, Remote Door Unlock,
Roadside Assistance, Turn-by-Turn
Navigation, and Hands-Free Calling
are available on most vehicles. Not
all OnStar services are available
everywhere or on all vehicles. For
more information, a full description
of OnStar services, system
limitations, and OnStar terms and
conditions:
.Call 1-888-4-ONSTAR
(1-888-466-7827).
.See www.onstar.com (U.S.).
.See www.onstar.ca (Canada).
.Call TTY 1-877-248-2080.
.PressQto speak with an
Advisor.
OnStar services cannot work unless
the vehicle is in a place where
OnStar has an agreement with a
wireless service provider for service

Black plate (7,1)GMC 2015i Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-8431500) - 2015 - crc - 6/20/14
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 (8,1)GMC 2015i Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-8431500) - 2015 - crc - 6/20/14
14-8 OnStar
Potential Issues
OnStar cannot perform Remote
Door Unlock or Stolen Vehicle
Assistance after the vehicle has
been off continuously for five days.
After five days, OnStar can contact
Roadside Assistance and 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,
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
Do not place items over or near the
antenna to prevent blocking cellular
and GPS signal reception. Cellular
reception is required for OnStar to
send remote signals to the vehicle.
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 on page 9-88. Added
electrical equipment may interfere
with the operation of the OnStar
system and cause it to not operate.
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
1-888-4-ONSTAR (1-888-466-7827)
or press
Qto speak with an
Advisor. Users of wireless
communications are cautioned that
the privacy of any information sent
via wireless cellular communications
cannot be assured. Third parties

Black plate (3,1)GMC 2015i Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-8431500) - 2015 - crc - 6/20/14
INDEX i-3
Child RestraintsInfants and Young
Children . . . . . . . . . . . . . . . . . . . . . 3-32
Lower Anchors and Tethers for Children . . . . . . . . . 3-38
Older Children . . . . . . . . . . . . . . . . 3-30
Securing . . . . . . . . . . . . . . . . 3-45, 3-47
Systems . . . . . . . . . . . . . . . . . . . . . . 3-35
Cleaning Exterior Care . . . . . . . . . . . . . . . 10-96
Interior Care . . . . . . . . . . . . . . . 10-101
Climate Control Systems Dual Automatic . . . . . . . . . . . . . . . . 8-1
Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4
Cluster, Instrument . . . . . . . . . . . . . 5-9
Collision Damage Repair . . . . . . 13-9
Compartments Storage . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Compass . . . . . . . . . . . . . . . . . . . . . . . 5-4 Messages . . . . . . . . . . . . . . . . . . . . 5-32
Connections
OnStar
®. . . . . . . . . . . . . . . . . . . . . . 14-4
Control . . . . . . . . . . . . . . . . . . . . . . . . 9-51 Traction and ElectronicStability . . . . . . . . . . . . . . . . . . . . . 9-49 Control Light
Hill Descent . . . . . . . . . . . . . . . . . . 5-22
Control of a Vehicle . . . . . . . . . . . . . 9-3
Convex Mirrors . . . . . . . . . . . . . . . . 2-14
Coolant Engine . . . . . . . . . . . . . . . . . . . . . . 10-18
Engine TemperatureGauge . . . . . . . . . . . . . . . . . . . . . . 5-13
Engine Temperature Warning Light . . . . . . . . . . . . . . . 5-24
Cooling System . . . . . . . . . . . . . . . 10-17
Engine Messages . . . . . . . . . . . . 5-33
Courtesy Transportation Program . . . . . . . . . . . . . . . . . . . . . . 13-8
Cruise Control . . . . . . . . . . . . . . . . . 9-52 Light . . . . . . . . . . . . . . . . . . . . . . . . . . 5-27
Cupholders . . . . . . . . . . . . . . . . . . . . . 4-1
Customer Assistance . . . . . . . . . . 13-4 Offices . . . . . . . . . . . . . . . . . . . . . . . . 13-3
Text Telephone (TTY)Users . . . . . . . . . . . . . . . . . . . . . . . 13-4
Customer Information Service PublicationsOrdering Information . . . . . . .13-11
Customer Satisfaction
Procedure . . . . . . . . . . . . . . . . . . . . 13-1
D
Damage Repair, Collision . . . . . . 13-9
Danger, Warnings, andCautions . . . . . . . . . . . . . . . . . . . . . . . . iv
Data Recorders, Event . . . . . . . 13-14
Daytime Running Lamps (DRL) . . . . . . . . . . . . . . . . . . 6-3
Defensive Driving . . . . . . . . . . . . . . . 9-3
Delayed Locking . . . . . . . . . . . . . . . . 2-9
Distracted Driving . . . . . . . . . . . . . . . 9-2
Dome Lamps . . . . . . . . . . . . . . . . . . . 6-7
Door Ajar Light . . . . . . . . . . . . . . . . . . . . . 5-27
Ajar Messages . . . . . . . . . . . . . . . 5-33
Delayed Locking . . . . . . . . . . . . . . . 2-9
Locks . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8
Power Locks . . . . . . . . . . . . . . . . . . . 2-9
Drive Belt Routing, Engine . . . . . 12-4
Driver Assistance Systems . . . . 9-55
Driver Information Center (DIC) . . . . . . . . . . . . . . . . . 5-27
Driving Assistance Systems . . . . . . . . . . 9-59
Characteristics andTowing Tips . . . . . . . . . . . . . . . . . 9-68
Defensive . . . . . . . . . . . . . . . . . . . . . . 9-3