2018 GMC SIERRA DENALI key

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-11349177) - 2018 - CRC - 10/17/17
440 Vehicle Care Steering, Suspension, and
Chassis Components Visually inspect steering,
suspension, and chassis
components for damaged, loose,
or missing parts or signs of wear at
least once a year.
Inspect power steering for proper
attachment, connections, binding,
leaks, cracks, chafing, etc.
Visually check constant velocity joint
boots and axle seals for leaks.
1500 Series vehicles, at least every
other oil change lubricate the outer
tie rod ends.
2500/3500 Series vehicles, at least
every other engine oil change
lubricate the upper and lower
control arm ball joints. Control arm
ball joints on 1500 series vehicles
are maintenance-free.
2500/3500 Series vehicles equipped
with steering linkage, at least every
other engine oil change lubricate the
tie rod ball joints, idler arm pivot
shaft bearings, idler arm socket, and
pitman arm socket. CautionLubrication of applicable steering/
suspension points should not be
done unless the temperature is
− 12 °C (10 °F) or higher,
or damage could result.
For an eAssist vehicle, see the
Silverado/Sierra eAssist
supplement.
Body Component Lubrication Lubricate all key lock cylinders,
hood hinges, liftgate hinges, and the
steel fuel door hinge unless the
components are plastic. Applying
silicone grease on weatherstrips
with a clean cloth will make them
last longer, seal better, and not stick
or squeak.
Underbody Maintenance
At least twice a year, spring and fall,
use plain water to flush any
corrosive materials from the
underbody. Take care to thoroughly
clean any areas where mud and other debris can collect. If equipped
with power assist steps, extend
them and then use a high pressure
wash to clean all joints and gaps.
Do not directly power wash the
transfer case and/or front/rear axle
output seals. High pressure water
can overcome the seals and
contaminate the fluid. Contaminated
fluid will decrease the life of the
transfer case and/or axles and
should be replaced.
Sheet Metal Damage If the vehicle is damaged and
requires sheet metal repair or
replacement, make sure the body
repair shop applies anti-corrosion
material to parts repaired or
replaced to restore corrosion
protection.
Original manufacturer replacement
parts will provide the corrosion
protection while maintaining the
vehicle warranty.

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-11349177) - 2018 - CRC - 10/17/17
Service and Maintenance 449.
Check tire inflation pressures.
See Tire Pressure 0 397 .
.
Inspect tire wear. See Tire
Inspection 0 404 .
.
Visually check for fluid leaks.
.
Inspect engine air cleaner filter.
See Engine Air Cleaner/Filter
0 358 .
.
Inspect brake system. See
Exterior Care 0 435 .
.
Visually inspect steering,
suspension, and chassis
components for damaged, loose,
or missing parts or signs of wear
at least once a year. See
Exterior Care 0 435 . Lubricate
the suspension and steering
components at least every other
oil change. (If equipped with
grease fittings)
.
Check restraint system
components. See Safety System
Check 0 75 . .
Visually inspect fuel system for
damage or leaks.
.
Visually inspect exhaust system
and nearby heat shields for
loose or damaged parts.
.
Lubricate body components. See
Exterior Care 0 435 .
.
Check starter switch. See Starter
Switch Check 0 374 .
.
Check automatic transmission
shift lock control function. See
Automatic Transmission Shift
Lock Control Function Check
0 374 .
.
Check ignition transmission lock.
See Ignition Transmission Lock
Check 0 374 .
.
Check parking brake and
automatic transmission park
mechanism. See Park Brake and
P (Park) Mechanism Check
0 375 . .
Check accelerator pedal for
damage, high effort, or binding.
Replace if needed.
.
Visually inspect gas strut for
signs of wear, cracks, or other
damage. Check the hold open
ability of the strut. If the hold
open ability is low, service the
gas strut. See Gas Strut(s)
0 376 .
.
Inspect sunroof track and seal,
if equipped. See Sunroof 0 55 .
.
Verify spare tire key lock
operation and lubricate as
needed. See Tire Changing
0 415 .

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-11349177) - 2018 - CRC - 10/17/17
Service and Maintenance 457Usage Fluid/Lubricant
Front Axle – Four-Wheel Drive SAE 75W-90 Synthetic Axle Lubricant (GM Part No. 88900401, in
Canada 89021678).
Hydraulic Brake System DOT 3 Hydraulic Brake Fluid (GM Part No. 19353126, in
Canada 19299819).
Hydraulic Power Steering System
(2500/3500 Series Only) GM Power Steering Fluid (GM Part No. 19329450, in Canada 19329451).
Key Lock Cylinders, Hood Hinges,
Body Door Hinge Pins, Tailgate
Hinge and Linkage, Fuel Door Hinge,
Tailgate Handle Pivot Points, Hinges,
Latch Bolt, and Linkage Multi-Purpose Lubricant, Superlube (GM Part No. 12346241, in
Canada 10953474).
Rear Axle (1500 Series) SAE 75W-85 Synthetic Axle Lubricant (GM Part No. 19300457, in
Canada 19300458).
Rear Axle (2500/3500 Series) SAE 75W-90 Synthetic Axle Lubricant (GM Part No. 88900401, in
Canada 89021678).
Transfer Case (Four-Wheel Drive) DEXRON-VI Automatic Transmission Fluid.
Weatherstrip Conditioning Weatherstrip Lubricant (GM Part No. 3634770, in Canada 10953518) or
Dielectric Silicone Grease (GM Part No. 12345579, in Canada 10953481).
Weatherstrip Squeaks Synthetic Grease with Teflon, Superlube (GM Part No. 12371287, in
Canada 10953437).
Windshield Washer Automotive windshield washer fluid that meets regional freeze protection
requirements.

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-11349177) - 2018 - CRC - 10/17/17
480 OnStar Press
= to:
.
Open the OnStar app on the
infotainment display. See the
infotainment manual for
information on how to use the
OnStar app.
Or
.
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.
.
Obtain and customize the Wi-Fi
hotspot name or SSID and
password, if equipped.
Press
Q to 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.

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-11349177) - 2018 - CRC - 10/17/17
484 OnStar 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. ”
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. ”
Verify Minutes and Expiration Press
= and say “ Minutes ” then
“ Verify ” to check how many minutes
remain and their expiration date.
Diagnostics By monitoring and reporting on the
vehicle ’ s key systems, OnStar
Advanced Diagnostics provides a
way to keep up on maintenance.
Capabilities vary by model. See
www.onstar.com for details and
system limitations. Message and
data rates may apply.
Includes:
.
Diagnostic Alerts: Set
preferences to receive real-time
e-mails, texts, or monthly
reports of the vehicle ’ s health.
Or press
Q to have an Advisor
initiate a remote diagnostic
report. .
Proactive Alerts: Receive a
real-time e-mail or text message
regarding potential issues with
key vehicle components, such
as the battery, fuel system,
or starter system. Alerts for
potential issues appear on the
infotainment display. Proactive
Alerts are designed to help
predict specific types of issues
based on information collected
from the vehicle. Other factors
may affect vehicle performance.
Not all issues will deliver alerts.
In some cases, a dealer service
check may be required to
confirm the accuracy of the
alerts.
.
Dealer Maintenance Notification:
Have the vehicle notify your
preferred dealer when it is time
for maintenance. Your dealer will
then contact you to set up an
appointment.
To begin, press
Q to speak to an
Advisor, or see www.onstar.com.

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-11349177) - 2018 - CRC - 10/17/17
496 Index General Information (cont'd)
Vehicle Care . . . . . . . . . . . . . . . . . . 342
Glove Box . . . . . . . . . . . . . . . . . . . . . . 124
GM Mobility Reimbursement
Program . . . . . . . . . . . . . . . . . . . . . . . 469
H Halogen Bulbs . . . . . . . . . . . . . . . . . . 378
Hazard Warning Flashers . . . . . . . 180
Head Restraints . . . . . . . . . . . . . . . . . 58
Headlamps
Aiming . . . . . . . . . . . . . . . . . . . . . . . . 377
Automatic . . . . . . . . . . . . . . . . . . . . . 179
Bulb Replacement . . . . . . . . . . . . 378
Daytime Running
Lamps (DRL) . . . . . . . . . . . . . . . . 179
Flash-to-Pass . . . . . . . . . . . . . . . . . 179
High Intensity Discharge
(HID) Lighting . . . . . . . . . . . . . . . 378
High-Beam On Light . . . . . . . . . . 157
High/Low Beam Changer . . . . . 179
Lamps On Reminder . . . . . . . . . 157
Heated
Steering Wheel . . . . . . . . . . . . . . . 130
Heated and Ventilated Front
Seats . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Heated Mirrors . . . . . . . . . . . . . . . . . . . 50 Heater
Engine Coolant . . . . . . . . . . . . . . . 260
Heating . . . . . . . . . . . . . . .224, 226, 228
High Voltage Devices and
Wiring . . . . . . . . . . . . . . . . . . . . . . . . . 380
High-Beam On Light . . . . . . . . . . . . 157
High-Speed Operation . . . . . . . . . . 399
Hill and Mountain Roads . . . . . . . . 245
Hill Descent Control (HDC) . . . . . 284
Hill Descent Control Light . . . . . . . 153
Hill Start Assist (HSA) . . . . . . . . . . 282
Home Page . . . . . . . . . . . . . . . . . . . . . 189
Hood . . . . . . . . . . . . . . . . . . . . . . . . . . . 344
Horn . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130
How to Wear Seat Belts
Properly . . . . . . . . . . . . . . . . . . . . . . . . 70
HVAC . . . . . . . . . . . . . . . . .224, 226, 228
I Idle System
Fast . . . . . . . . . . . . . . . . . . . . . . . . . . 259
Ignition Positions . . . . . . . . . . . . . . . 256
Ignition Transmission Lock
Check . . . . . . . . . . . . . . . . . . . . . . . . . 374
Immobilizer . . . . . . . . . . . . . . . . . . . . . . 46
Indicator
Vehicle Ahead . . . . . . . . . . . . . . . . 154 Infants and Young Children,
Restraints . . . . . . . . . . . . . . . . . . . . . . 94
Infotainment . . . . . . . . . . . . . . . . . . . . 186
Infotainment System . . . . . . . . . . . . 478
Instrument Cluster . . . . . . . . . . . . . . 138
Instrument Panel
Storage Area . . . . . . . . . . . . . . . . . 124
Interior Rearview Mirrors . . . . . . . . . 51
Introduction . . . . . . . . . . . . . . . . . . . . . . . 2
J Jack
Auxiliary . . . . . . . . . . . . . . . . . . . . . . 203
Jump Starting - North
America . . . . . . . . . . . . . . . . . . . . . . . 426
K Keyless Entry
Remote (RKE) System . . . . . . . . . 37
Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
L Labeling, Tire Sidewall . . . . . . . . . . 391
Lamps
Auxiliary Roof
Mounted Lamp . . . . . . . . . . . . . . 182
Cargo . . . . . . . . . . . . . . . . . . . . . . . . . 183
Daytime Running (DRL) . . . . . . 179
Dome . . . . . . . . . . . . . . . . . . . . . . . . . 183

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-11349177) - 2018 - CRC - 10/17/17
Index 499Parking (cont'd)
Over Things That Burn . . . . . . . 264
Parking Assist . . . . . . . . . . . . . . . . . . 289
Parking or Backing
Assistance Systems . . . . . . . . . . 289
Passenger Airbag Status
Indicator . . . . . . . . . . . . . . . . . . . . . . 149
Passenger Compartment Air
Filter . . . . . . . . . . . . . . . . . . . . . . . . . . 232
Passenger Sensing System . . . . . 86
Perchlorate Materials
Requirements, California . . . . . . 343
Personalization
Vehicle . . . . . . . . . . . . . . . . . . . . . . . 165
Phone
Apple CarPlay and
Android Auto . . . . . . . . . . . . . . . . 217
Bluetooth . . . . . . . . . . . . . . . . 211, 213
Pickup Conversion to
Chassis Cab . . . . . . . . . . . . . . . . . . 340
Port
USB . . . . . . . . . . . . . . . . . . . . . . . . . . 197
Power
Door Locks . . . . . . . . . . . . . . . . . . . . . 41
Mirrors . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Outlets . . . . . . . . . . . . . . . . . . . . . . . 133
Protection, Battery . . . . . . . . . . . . 185
Retained Accessory (RAP) . . . 260 Power (cont'd)
Seat Adjustment . . . . . . . . . . . . . . . . 60
Steering Fluid . . . . . . . . . . . . . . . . . 365
Windows . . . . . . . . . . . . . . . . . . . . . . . 52
Power Assist Steps . . . . . . . . . . . . . . 43
Pregnancy, Using Seat Belts . . . . 74
Privacy
Vehicle Data Recording . . . . . . . 477
Program
Courtesy Transportation . . . . . . 471
Proposition
65 Warning,
California . . . . . . . . . . . .343, 369, 426,
Back Cover
R Radio Frequency Statement . . . . 475
Radio Reception . . . . . . . . . . . . . . . . 193
Radios
AM-FM Radio . . . . . . . . . . . . . . . . . 190
Satellite . . . . . . . . . . . . . . . . . . . . . . . 192
Reading Lamps . . . . . . . . . . . . . . . . . 183
Rear Axle . . . . . . . . . . . . . . . . . . . . . . . 371
Locking . . . . . . . . . . . . . . . . . . . . . . . 285
Rear Seats . . . . . . . . . . . . . . . . . . 66, 68
Rear Vision Camera (RVC) . . . . . 289
Rear Windows . . . . . . . . . . . . . . . . . . . 54
Rearview Mirrors . . . . . . . . . . . . . . . . 52 Rearview Mirrors (cont'd)
Automatic Dimming . . . . . . . . . . . . . 52
Reclining Seatbacks . . . . . . . . . . . . . 61
Recognition
Voice . . . . . . . . . . . . . . . . . . . . . . . . . 205
Recommended Fluids and
Lubricants . . . . . . . . . . . . . . . . . . . . . 456
Records
Maintenance . . . . . . . . . . . . . . . . . . 459
Recreational Vehicle Towing . . . . 430
Reimbursement Program,
GM Mobility . . . . . . . . . . . . . . . . . . . 469
Remote Keyless Entry (RKE)
System . . . . . . . . . . . . . . . . . . . . . . . . . 37
Remote Vehicle Start . . . . . . . . . . . . 39
Replacement Parts
Airbags . . . . . . . . . . . . . . . . . . . . . . . . . 92
Maintenance . . . . . . . . . . . . . . . . . . 458
Replacing Airbag System . . . . . . . . 92
Replacing LATCH System
Parts after a Crash . . . . . . . . . . . . 111
Replacing Seat Belt System
Parts after a Crash . . . . . . . . . . . . . 76
Reporting Safety Defects
Canadian Government . . . . . . . . 476
General Motors . . . . . . . . . . . . . . . 477
U.S. Government . . . . . . . . . . . . . 476