
GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-9955992) - 2017 - crc - 5/3/16
Vehicle Care 373
Headlamp Aiming
Headlamp aim has been preset and
should need no further adjustment.
If the vehicle is damaged in a crash,
the headlamp aim may be affected.
If adjustment to the headlamps is
necessary, see your dealer.
Bulb Replacement
For the proper type of replacement
bulbs, contact your dealer.
For any bulb-changing procedure
not listed in this section, contact
your dealer.
Halogen Bulbs
{Warning
Halogen bulbs have pressurized
gas inside and can burst if you
drop or scratch the bulb. You or
others could be injured. Be sure
to read and follow the instructions
on the bulb package.
High Intensity Discharge
(HID) Lighting
{Warning
The High Intensity Discharge
(HID) lighting system operates at
a very high voltage. If you try to(Continued)
Warning (Continued)
service any of the system
components, you could be
seriously injured. Have your
dealer or a qualified technician
service them.
After an HID headlamp bulb has
been replaced, the beam might be a
slightly different shade than it was
originally. This is normal.
LED Lighting
This vehicle has several LED lamps.
For replacement of any LED lighting
assembly, contact your dealer.

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-9955992) - 2017 - crc - 5/3/16
486 Index
General Information (cont'd)Towing . . . . . . . . . . . . . . . . . . . . . . . . 304
Vehicle Care . . . . . . . . . . . . . . . . . . 340
Glass Replacement . . . . . . . . . . . . . 372
Glove Box . . . . . . . . . . . . . . . . . . . . . . 108
GM Mobility Reimbursement
Program . . . . . . . . . . . . . . . . . . . . . . . 461
H
Halogen Bulbs . . . . . . . . . . . . . . . . . . 373
Hazard Warning Flashers . . . . . . . 170
Head Restraints . . . . . . . . . . . . . . . . . 51
HeadlampsAiming . . . . . . . . . . . . . . . . . . . . . . . . 373
Automatic . . . . . . . . . . . . . . . . . . . . . 169
Bulb Replacement . . . . . . . . . . . . 373
Daytime Running
Lamps (DRL) . . . . . . . . . . . . . . . . 169
Flash-to-Pass . . . . . . . . . . . . . . . . . 169
High Intensity Discharge
(HID) Lighting . . . . . . . . . . . . . . . 373
High-Beam On Light . . . . . . . . . . 140
High/Low Beam Changer . . . . . 168
Lamps On Reminder . . . . . . . . . 140
Heated Steering Wheel . . . . . . . . . . . . . . . .114
Heated and Ventilated Front Seats . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Heated Mirrors . . . . . . . . . . . . . . . . . . . 43 Heater
Engine Coolant . . . . . . . . . . . . . . . 262
High Voltage Devices and Wiring . . . . . . . . . . . . . . . . . . . . . . . . . 376
High-Beam On Light . . . . . . . . . . . . 140
High-Speed Operation . . . . . . . . . . 393
Hill and Mountain Roads . . . . . . . . 247
Hill Descent Control (HDC) . . . . . 286
Hill Descent Control Light . . . . . . . 136
Hill Start Assist (HSA) . . . . . . . . . . 283
Home Page . . . . . . . . . . . . . . . . 181, 183
Hood . . . . . . . . . . . . . . . . . . . . . . . . . . . 342
Horn . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114
How to Wear Safety Belts Properly . . . . . . . . . . . . . . . . . . . . . . . . 60
I
Idle SystemFast . . . . . . . . . . . . . . . . . . . . . . . . . . 261
Ignition Positions . . . . . . . . . . . . . . . 259
Ignition Transmission Lock Check . . . . . . . . . . . . . . . . . . . . . . . . . 371
Immobilizer . . . . . . . . . . . . . . . . . . . . . . 40
Indicator Vehicle Ahead . . . . . . . . . . . . . . . . 137
Infants and Young Children,
Restraints . . . . . . . . . . . . . . . . . . . . . . 83
Infotainment . . . . . . . . . . . . . . . . . . . . 176
Infotainment System . . . . . . . . . . . . 470 Instrument Cluster . . . . . . . . . . . . . . 121
Instrument Panel
Storage Area . . . . . . . . . . . . . . . . . 108
Interior Rearview Mirrors . . . . . . . . . 45
Introduction . . . . . . . . . . . . . . . . . . . . . . . 2
J
Jack Auxiliary . . . . . . . . . . . . . . . . . . . . . . 202
Jump Starting - North America . . . . . . . . . . . . . . . . . . . . . . . 418
K
Key and Lock Messages . . . . . . . . 148
Keyless EntryRemote (RKE) System . . . . . . . . . 31
Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
L
Labeling, Tire Sidewall . . . . . . . . . . 385
Lamps
Auxiliary RoofMounted Lamp . . . . . . . . . . . . . . 171
Cargo . . . . . . . . . . . . . . . . . . . . . . . . . 172
Daytime Running (DRL) . . . . . . 169
Dome . . . . . . . . . . . . . . . . . . . . . . . . . 173
Exterior Controls . . . . . . . . . . . . . . 166
Exterior Lamps Off Reminder . . . . . . . . . . . . . . . . . . . 168
Malfunction Indicator . . . . . . . . . 133

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-9955992) - 2017 - crc - 5/3/16
Index 487
Lamps (cont'd)Messages . . . . . . . . . . . . . . . . . . . . 148
On Reminder . . . . . . . . . . . . . . . . . 140
Reading . . . . . . . . . . . . . . . . . . . . . . 173
Lane Departure Warning (LDW) . . . . . . . . . . . . . . . . 296
Lane Departure Warning Light . . . . . . . . . . . . . . . . . . . . . . . . . . 136
Lane Keep Assist (LKA) . . . . . . . . 298
Lane Keep Assist Light . . . . . . . . . 136
Lap Belt . . . . . . . . . . . . . . . . . . . . . . . . . 64
Lap-Shoulder Belt . . . . . . . . . . . . . . . 61
LATCH System Replacing Parts after a
Crash . . . . . . . . . . . . . . . . . . . . . . . . . 94
LATCH, Lower Anchors and Tethers for Children . . . . . . . . . . . . 88
LED Lighting . . . . . . . . . . . . . . . . . . . . 373
Light
Hill Decent Control . . . . . . . . . . . 136
Lighting Entry . . . . . . . . . . . . . . . . . . . . . . . . . 174
Exit . . . . . . . . . . . . . . . . . . . . . . . . . . . 174
Illumination Control . . . . . . . . . . . 172
LED . . . . . . . . . . . . . . . . . . . . . . . . . . 373
Lights . . . . . . . . . . . . . . . . . . . . . . . . . . . 136 Airbag On-Off . . . . . . . . . . . . . . . . . 130
Airbag Readiness . . . . . . . . . . . . . 130 Lights (cont'd)
Antilock Brake System
(ABS) Warning . . . . . . . . . . . . . . 135
Brake System Warning . . . . . . . 134
Charging System . . . . . . . . . . . . . 132
Cruise Control . . . . . . . . . . . . . . . . 140
Door Ajar . . . . . . . . . . . . . . . . . . . . . 141
Engine Coolant Temperature Warning . . . . . . . 138
Engine Oil Pressure . . . . . . . . . . 139
Flash-to-Pass . . . . . . . . . . . . . . . . . 169
Four-Wheel-Drive . . . . . . . . . . . . . 136
Front Fog Lamp . . . . . . . . . . . . . . 140
High-Beam On . . . . . . . . . . . . . . . . 140
High/Low Beam Changer . . . . . 168
Lane Departure Warning . . . . . . 136
Low Fuel Warning . . . . . . . . . . . . 139
Safety Belt Reminders . . . . . . . . 129
Security . . . . . . . . . . . . . . . . . . . . . . 140
StabiliTrak
®OFF . . . . . . . . . . . . . 137
Tire Pressure . . . . . . . . . . . . . . . . . 138
Tow/Haul Mode . . . . . . . . . . . . . . . 136
Traction Control System (TCS)/StabiliTrak
®. . . . . . . . . . 138
Traction Off . . . . . . . . . . . . . . . . . . . 137
Locking Rear Axle . . . . . . . . . . . . . . 286
Locks Automatic Door . . . . . . . . . . . . . . . . . 35 Locks (cont'd)
Delayed Locking . . . . . . . . . . . . . . . . 35
Door . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Lockout Protection . . . . . . . . . . . . . . 36
Power Door . . . . . . . . . . . . . . . . . . . . . 35
Safety . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Loss of Control . . . . . . . . . . . . . . . . . 241
Low Fuel Warning Light . . . . . . . . . 139
Low-Profile Tires . . . . . . . . . . . . . . . . 385
Lower Anchors and Tethers for Children (LATCH
System) . . . . . . . . . . . . . . . . . . . . . . . . 88
Lumbar Adjustment . . . . . . . . . . . . . . 52 Front Seats . . . . . . . . . . . . . . . . . . . . . 52
M
Maintenance
Records . . . . . . . . . . . . . . . . . . . . . . 451
Maintenance and Care
Additional . . . . . . . . . . . . . . . . . . . . . 444
Maintenance Schedule . . . . . . . . . 438 Recommended Fluids andLubricants . . . . . . . . . . . . . . . . . . . 447
Transfer Case . . . . . . . . . . . . . . . . 274
Malfunction Indicator Lamp . . . . . 133
Manual Mirrors . . . . . . . . . . . . . . . . . . 41
Manual Mode . . . . . . . . . . . . . . . . . . . 270
Manual Windows . . . . . . . . . . . . . . . . 46
Memory Features . . . . . . . . . . . . . . . . 11