GMC SIERRA DENALI 2018 Owners Manual

84016542 BC
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GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-11349177) - 2018 - CRC - 10/17/17
Contents Introduction . . . . . . . . . . . . . . . . . . . . . . 2
In Brief . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Keys, Doors, and Windows . . . . . 34
Seats and Restraints . . . . . . . . . . . 57
Storage . . . . . . . . . . . . . . . . . . . . . . . 124
Instruments and Controls . . . . . . 128
Lighting . . . . . . . . . . . . . . . . . . . . . . . 176
Infotainment System . . . . . . . . . . 186
Climate Controls . . . . . . . . . . . . . . 224
Driving and Operating . . . . . . . . . 234
Vehicle Care . . . . . . . . . . . . . . . . . . 341
Service and Maintenance . . . . . 446
Technical Data . . . . . . . . . . . . . . . . 460
Customer Information . . . . . . . . . 465
Reporting Safety Defects . . . . . . 476
OnStar . . . . . . . . . . . . . . . . . . . . . . . . 479
Index . . . . . . . . . . . . . . . . . . . . 491

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-11349177) - 2018 - CRC - 10/17/17
2 Introduction
Introduction The names, logos, emblems,
slogans, vehicle model names, and
vehicle body designs appearing in
this manual including, but not limited
to, GM, the GM logo, GMC, the
GMC Truck Emblem, SIERRA, and
DENALI are trademarks and/or
service marks of General Motors
LLC, its subsidiaries, affiliates,
or licensors.
For vehicles first sold in Canada,
substitute the name “ General
Motors of Canada Company ” for
GMC Division wherever it appears
in this manual. This manual describes features that
may or may not be on the vehicle
because of optional equipment that
was not purchased on the vehicle,
model variants, country
specifications, features/applications
that may not be available in your
region, or changes subsequent to
the printing of this owner ’ s manual.
If the vehicle has the Duramax
diesel engine, see the Duramax
diesel supplement for additional and
specific information on this engine.
For an eAssist vehicle, see the
Silverado/Sierra eAssist
supplement.
Refer to the purchase
documentation relating to your
specific vehicle to confirm the
features.
Keep this manual in the vehicle for
quick reference. Canadian Vehicle Owners A French language manual can be
obtained from your dealer, at
www.helminc.com, or from:
Propriétaires Canadiens On peut obtenir un exemplaire de
ce guide en français auprès du
concessionnaire ou à l'adresse
suivante:
Helm, Incorporated
Attention: Customer Service
47911 Halyard Drive
Plymouth, MI 48170
USA
Using this Manual To quickly locate information about
the vehicle, use the Index in the
back of the manual. It is an
alphabetical list of what is in the
manual and the page number where
it can be found.
Litho in U.S.A.
Part No. 84016542 B Second Printing ©
2017 General Motors LLC. All Rights Reserved.

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-11349177) - 2018 - CRC - 10/17/17
Introduction 3
Danger, Warning, and
Caution Warning messages found on vehicle
labels and in this manual describe
hazards and what to do to avoid or
reduce them.
{ DangerDanger indicates a hazard with a
high level of risk which will result
in serious injury or death.
{ WarningWarning indicates a hazard that
could result in injury or death.
Caution
Caution indicates a hazard that
could result in property or vehicle
damage. A circle with a slash through it is a
safety symbol which means “ Do
Not, ” “ Do not do this, ” or “ Do not let
this happen. ”
Symbols The vehicle has components and
labels that use symbols instead of
text. Symbols are shown along with
the text describing the operation or
information relating to a specific
component, control, message,
gauge, or indicator.
M : Shown when the owner ’ s
manual has additional instructions
or information.
* : Shown when the service
manual has additional instructions
or information.
0 : Shown when there is more
information on another page —
“ see page. ” Vehicle Symbol Chart
Here are some additional symbols
that may be found on the vehicle
and what they mean. See the
features in this manual for
information.
9 : Airbag Readiness Light
# : Air Conditioning
! : Antilock Brake System (ABS)
$ : Brake System Warning Light
" : Charging System
I : Cruise Control
` : Do Not Puncture
^ : Do Not Service
B : Engine Coolant Temperature
O : Exterior Lamps
_ : Flame/Fire Prohibited
. : Fuel Gauge
+ : Fuses
3 : Headlamp High/Low-Beam
Changer
j : ISOFIX/LATCH System Child
Restraints

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-11349177) - 2018 - CRC - 10/17/17
4 Introduction
* : Malfunction Indicator Lamp
: : Oil Pressure
O : Power
/ : Remote Vehicle Start
> : Seat Belt Reminders
7 : Tire Pressure Monitor
d : Traction Control/StabiliTrak
a : Under Pressure
M : Windshield Washer Fluid

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-11349177) - 2018 - CRC - 10/17/17
In Brief 5
In Brief Instrument Panel Instrument Panel . . . . . . . . . . . . . . . . 6
Initial Drive Information Initial Drive Information . . . . . . . . . . 8
Remote Keyless Entry (RKE)
System . . . . . . . . . . . . . . . . . . . . . . . . 8
Remote Vehicle Start . . . . . . . . . . . 9
Door Locks . . . . . . . . . . . . . . . . . . . . . 9
Windows . . . . . . . . . . . . . . . . . . . . . . . 10
Seat Adjustment . . . . . . . . . . . . . . . 11
Memory Features . . . . . . . . . . . . . . 13
Heated and Ventilated Seats . . . 13
Head Restraint Adjustment . . . . 14
Seat Belts . . . . . . . . . . . . . . . . . . . . . 14
Passenger Sensing System . . . 14
Mirror Adjustment . . . . . . . . . . . . . . 15
Steering Wheel Adjustment . . . . 16
Throttle and Brake Pedal
Adjustment . . . . . . . . . . . . . . . . . . . 17
Interior Lighting . . . . . . . . . . . . . . . . 17
Exterior Lighting . . . . . . . . . . . . . . . 18
Windshield Wiper/Washer . . . . . . 19
Climate Controls . . . . . . . . . . . . . . . 20
Transmission . . . . . . . . . . . . . . . . . . 22
Four-Wheel Drive . . . . . . . . . . . . . . 23 Vehicle Features Infotainment System . . . . . . . . . . . 24
Radio(s) . . . . . . . . . . . . . . . . . . . . . . . 24
Satellite Radio . . . . . . . . . . . . . . . . . 25
Portable Audio Devices . . . . . . . . 25
Bluetooth . . . . . . . . . . . . . . . . . . . . . . 25
Steering Wheel Controls . . . . . . . 26
Cruise Control . . . . . . . . . . . . . . . . . 26
Driver Information
Center (DIC) . . . . . . . . . . . . . . . . . 27
Forward Collision Alert (FCA)
System . . . . . . . . . . . . . . . . . . . . . . . 27
Forward Automatic
Braking (FAB) . . . . . . . . . . . . . . . . 27
Lane Departure
Warning (LDW) . . . . . . . . . . . . . . . 28
Lane Keep Assist (LKA) . . . . . . . 28
Rear Vision Camera (RVC) . . . . 28
Parking Assist . . . . . . . . . . . . . . . . . 28
Power Outlets . . . . . . . . . . . . . . . . . 28
Universal Remote System . . . . . 29
Sunroof . . . . . . . . . . . . . . . . . . . . . . . . 29
Performance and Maintenance Traction Control/Electronic
Stability Control . . . . . . . . . . . . . . 30
Tire Pressure Monitor . . . . . . . . . . 31
Fuel (Gasoline - Except
L86 6.2L Engine) . . . . . . . . . . . . . 31 Fuel (Gasoline - L86 6.2L
Engine) . . . . . . . . . . . . . . . . . . . . . . . 32
Fuel (Diesel) . . . . . . . . . . . . . . . . . . . 32
E85 or FlexFuel . . . . . . . . . . . . . . . . 32
Engine Oil Life System . . . . . . . . 32
Driving for Better Fuel
Economy . . . . . . . . . . . . . . . . . . . . . 33
Roadside Assistance
Program . . . . . . . . . . . . . . . . . . . . . . 33

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-11349177) - 2018 - CRC - 10/17/17
6 In Brief
Instrument Panel
Uplevel Shown, Base Similar

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-11349177) - 2018 - CRC - 10/17/17
In Brief 71. Instrument Panel Illumination
Control 0 182 .
2. Integrated Trailer Brake Control
(ITBC) System (If Equipped).
See Towing Equipment 0 325 .
3. Exterior Lamp Controls 0 176 .
Fog Lamps 0 181 (If
Equipped).
4. Air Vents 0 231 .
5. Turn Signal Lever. See Turn
and Lane-Change Signals
0 181 .
Windshield Wiper/Washer
0 130 .
6. Favorite Switches (Out of
View). See Steering Wheel
Controls 0 129 .
Volume Switches (Out of View).
See Steering Wheel Controls
0 129 .
7. Instrument Cluster 0 138 .
8. Hazard Warning Flashers
0 180 .
9. Shift Lever. See Automatic
Transmission 0 265 . Tow/Haul Selector Button (If
Equipped). See Tow/Haul
Mode 0 271 .
Range Selection Mode (If
Equipped). See Manual Mode
0 268 .
10. Light Sensor. See Automatic
Headlamp System 0 179 .
11. Infotainment 0 186 .
12. Passenger Airbag On-Off
Switch (If Equipped) (Out of
View). See Airbag On-Off
Switch 0 84 .
13. Heated and Ventilated Front
Seats 0 65 (If Equipped).
14. Power Outlet 110/120V
Alternating Current (If
Equipped). See Power Outlets
0 133 .
15. Power Outlets 0 133 (If
Equipped).
16. USB Port 0 197 (If Equipped).
17.
g Traction Control/Electronic
Stability Control 0 282 .0 Pedal Adjust Switch (If
Equipped). See Adjustable
Throttle and Brake Pedal
0 256 .
{ Cargo Lamp 0 183 .
X Parking Assist Button (If
Equipped). See Assistance
Systems for Parking or Backing
0 289 .
A Lane Keep Assist (LKA)
(1500 Series) 0 297 (If
Equipped).
5 Hill Descent Control Switch
(If Equipped). See Hill Descent
Control (HDC) 0 284 .
q Exhaust Brake Switch (If
Equipped). See “ Exhaust
Brake ” in the Duramax diesel
supplement.
g Power Take Off (PTO)
Switch (If Equipped). See the
Duramax diesel supplement.

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-11349177) - 2018 - CRC - 10/17/17
8 In Brief Auxiliary Button (If Equipped).
See Add-On Electrical
Equipment 0 336 .
j Power Assist Steps 0 43 (If
Equipped).
18. Dual Automatic Climate Control
System 0 228 (If Equipped).
19. Steering Wheel Controls 0 129
(If Equipped).
Driver Information Center (DIC)
Controls. See Driver
Information Center (DIC)
(Uplevel and Denali Cluster)
0 160 or Driver Information
Center (DIC) (Base Level
Cluster) 0 158 .
20. Hood Release. See Hood
0 344 .
21. Horn 0 130 . 22. Steering Wheel Adjustment
0 129 (Out of View).
23. Cruise Control 0 285 .
Heated Steering Wheel 0 130
(If Equipped).
Forward Collision Alert (FCA)
System 0 292 (If Equipped).
24. Data Link Connector (DLC)
(Out of View). See Malfunction
Indicator Lamp (Check Engine
Light) 0 150 .
25. Parking Brake 0 281 .
26. Electronic Transfer Case Knob
(If Equipped). See Four-Wheel
Drive 0 272 .
Card Holder (If Equipped). See
Instrument Panel Storage
0 124 .Initial Drive
Information This section provides a brief
overview about some of the
important features that may or may
not be on your specific vehicle.
For more detailed information, refer
to each of the features which can be
found later in this owner ’ s manual.
Remote Keyless Entry
(RKE) System The Remote Keyless Entry (RKE)
transmitter functions may work from
up to 60 m (197 ft) away from the
vehicle.

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-11349177) - 2018 - CRC - 10/17/17
In Brief 9
K : Press to unlock the driver door.
Press
K again within three seconds
to unlock all remaining doors and
the tailgate, if equipped.
Q : Press to lock all doors and the
tailgate. Lock and unlock feedback
can be personalized. See Vehicle
Personalization 0 165 .
7 : Press and release one time to
initiate vehicle locator. Press
7 and
hold for at least three seconds to
sound the panic alarm. Press
7again to cancel the panic alarm. See Keys 0 34 and Remote Keyless
Entry (RKE) System Operation 0 37 .
Remote Vehicle Start If equipped, the engine can be
started from outside of the vehicle.
Starting the Vehicle 1. Press and release
Q on the
RKE transmitter.
2. Immediately press and hold
/for at least four seconds or until
the turn signal lamps flash.
Start the vehicle normally after
entering.
When the vehicle starts, the parking
lamps will turn on.
Remote start can be extended.
Canceling a Remote Start
To cancel a remote start, do one of
the following:
.
Press and hold
/ until the
parking lamps turn off. .
Turn on the hazard warning
flashers.
.
Turn the vehicle on and then off.
See Remote Vehicle Start 0 39 .
Door Locks There are several ways to lock and
unlock the vehicle.
From outside, use the Remote
Keyless Entry (RKE) transmitter or
the key in the driver door.
From inside, use the power door
locks.
From inside, pull the door handle
once to unlock the door. Pull again
to open the door.