flat tire GMC YUKON 2021 Service Manual

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-13690468) - 2021 - crc - 8/14/20
OnStar 411
.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 safety
and security 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.
OnStar Additional
Information
In-Vehicle Audio Messages
Audio messages may play important
information at the following times:
.Prior to vehicle purchase. PressQto set
up an account.
.After change in ownership and at
90 days.
Transferring Service
PressQto request account transfer
eligibility information. The Advisor can
cancel or change account information.
Selling/Transferring the Vehicle
Call 1-888-4ONSTAR (1-888-466-7827)
immediately to terminate your OnStar or
connected services if the vehicle is disposed
of, sold, transferred, or if the lease ends.

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./Cana-
da/Mexico-13690468) - 2021 - crc - 8/14/20
418 Index
IndexA
Accessories and Modifications . . . . . . . . . . . 309
Accessory Power . . . . . . . . . . . . . . . . . . . . . . . . . 229
Adaptive Cruise Control . . . . . . . . . . . . . . . . . . 253
Add-On Electrical Equipment . . . . . . . . . . . . . 306
Additional InformationOnStar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 411
Additional Maintenance and Care . . . . . . . . 390
Adjustments Lumbar, Front Seats . . . . . . . . . . . . . . . . . . . . 40
Agreements Trademarks and License . . . . . . . . . . . . . . . 196
Air Cleaner/Filter, Engine . . . . . . . . . . . . . . . . .318
Air Conditioning . . . . . . . . . . . . . . . . . . . . 204, 207
Air Filter Life System . . . . . . . . . . . . . . . . . . . . . . . . . . . . 318
Air Filter, Passenger Compartment . . . . . . . 209
Air Suspension Four Corner . . . . . . . . . . . . . . . . . . . . . . . . . . . . 248
Air Vents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 208
Airbag System Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
How Does an Airbag Restrain? . . . . . . . . . . 64
Passenger Sensing System . . . . . . . . . . . . . . 66
What Makes an Airbag Inflate? . . . . . . . . . 64
What Will You See after an AirbagInflates? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
When Should an Airbag Inflate? . . . . . . . . 63 Airbag System (cont'd)
Where Are the Airbags? . . . . . . . . . . . . . . . . 62
Airbags Adding Equipment to the Vehicle . . . . . . . 69
Passenger Status Indicator . . . . . . . . . . . . . 110
Readiness Light . . . . . . . . . . . . . . . . . . . . . . . . 109
Servicing Airbag-Equipped Vehicles . . . . . . 69
System Check . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Alarm Vehicle Security . . . . . . . . . . . . . . . . . . . . . . . . 25
Alert Lane Change . . . . . . . . . . . . . . . . . . . . . . . . . . . 272
Rear Pedestrian . . . . . . . . . . . . . . . . . . . . . . . . 266
Side Blind Zone (SBZA) . . . . . . . . . . . . . . . . . 272
All-Season Tires . . . . . . . . . . . . . . . . . . . . . . . . . . 340
All-Terrain Tires . . . . . . . . . . . . . . . . . . . . . . . . . . 340
AM-FM Radio . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148
Antenna Multi-band . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151
Antilock Brake System (ABS) . . . . . . . . . . . . . 240 Warning Light . . . . . . . . . . . . . . . . . . . . . . . . . . 113
Appearance Care Exterior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 374
Interior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 378
Apple CarPlay and Android Auto . . . . . . . . . 186
Armrest Storage . . . . . . . . . . . . . . . . . . . . . . . . . . 90
Assistance Program, Roadside . . . . . . . . . . . . 402
Assistance Systems for Driving . . . . . . . . . . 267

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./Cana-
da/Mexico-13690468) - 2021 - crc - 8/14/20
Index 421
Driving (cont'd)Defensive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 214
Hill and Mountain Roads . . . . . . . . . . . . . . 220
If the Vehicle is Stuck . . . . . . . . . . . . . . . . . 221
Impaired . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 214
Loss of Control . . . . . . . . . . . . . . . . . . . . . . . . 216
Off-Road . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 216
Off-Road Recovery . . . . . . . . . . . . . . . . . . . . . 215
Vehicle Load Limits . . . . . . . . . . . . . . . . . . . . 222
Wet Roads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 219
Winter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 221
Dual Automatic Climate Control
System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 204
Dynamic Fuel Management . . . . . . . . . . . . . . . 231
E
Electric Brake Boost . . . . . . . . . . . . . . . . . . . . . . 240
Electric Parking Brake . . . . . . . . . . . . . . . . . . . . 240
Electric Parking Brake Light . . . . . . . . . . . . . . . 113
Electrical Equipment, Add-On . . . . . . . . . . . . 306
Electrical System Engine Compartment Fuse Block . . . . . . . 332
Fuses and Circuit Breakers . . . . . . . . . . . . . 331
Instrument Panel Fuse Block . . . . . . . . . . . 335
Overload . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 331
Rear Compartment Fuse Block . . . . . . . . . 337
Electronic Stability Control (ESC) Off Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116 Emergency
OnStar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 411
Engine Air Cleaner/Filter . . . . . . . . . . . . . . . . . . . . . . 318
Check Light (Malfunction Indicator) . . . . . 111
Compartment Overview . . . . . . . . . . . . . . . . 312
Coolant Temperature Gauge . . . . . . . . . . . 108
Coolant Temperature Warning Light . . . . 116
Cooling System . . . . . . . . . . . . . . . . . . . . . . . . 319
Drive Belt Routing . . . . . . . . . . . . . . . . . . . . . 398
Exhaust . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 231
Fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 324
Oil Life System . . . . . . . . . . . . . . . . . . . . . . . . 316
Oil Pressure Gauge . . . . . . . . . . . . . . . . . . . . 107
Oil Pressure Light . . . . . . . . . . . . . . . . . . . . . . . 118
Overheating . . . . . . . . . . . . . . . . . . . . . . . . . . . 322
Power Messages . . . . . . . . . . . . . . . . . . . . . . . 125
Running While Parked . . . . . . . . . . . . . . . . . 232
Starting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 228
Engine Air Filter Life System . . . . . . . . . . . . . .318
Entry Lighting . . . . . . . . . . . . . . . . . . . . . . . . . . . 140
Equipment, Towing . . . . . . . . . . . . . . . . . . . . . . 287
Event Data Recorders . . . . . . . . . . . . . . . . . . . . 409
Exit Lighting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140
Extended Parking . . . . . . . . . . . . . . . . . . . . . . . . . 231
Extender, Seat Belt . . . . . . . . . . . . . . . . . . . . . . . 59
Exterior Lamp Controls . . . . . . . . . . . . . . . . . . . .134
Exterior Lamps Off Reminder . . . . . . . . . . . . 136 Exterior Lighting Battery Saver . . . . . . . . . . . 141
F
Fan
Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 324
Filter, Engine Air Cleaner . . . . . . . . . . . . . . . . . . . . . 318
Flash-to-Pass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136
Flashers, Hazard Warning . . . . . . . . . . . . . . . . . 137
Flat Tire . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 355 Changing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 356
Floor Console Storage . . . . . . . . . . . . . . . . . . . . . 92
Floor Mats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .381
Fluid
Automatic Transmission . . . . . . . . . . . . . . . . 317
Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 326
Four-Wheel Drive Transfer Case . . . . . . . . 236
Washer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 324
Fog Lamps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .138
Folding Mirrors . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Forward Collision Alert (FCA) System . . . . 267
Four Corner Air Suspension Light . . . . . . . . . 117
Four Corner Air Suspension System . . . . . . 248
Four-Wheel Drive . . . . . . . . . . . . . . . . . . . .236, 327
Four-Wheel-Drive Light . . . . . . . . . . . . . . . . . . . . 114
Frequency Statement Radio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 407
Front Axle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 328

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./Cana-
da/Mexico-13690468) - 2021 - crc - 8/14/20
Index 427
Service (cont'd)Maintenance, General Information . . . . . 383
Parts Identification . . . . . . . . . . . . . . . . . . . . . 396
Scheduling Appointments . . . . . . . . . . . . . . 403
Service Electric Parking Brake Light . . . . . . . 113
Services Special Application . . . . . . . . . . . . . . . . . . . . . 390
Servicing System . . . . . . . . . . . . . . . . . . . . . . . . . 175
Servicing the Airbag . . . . . . . . . . . . . . . . . . . . . . 69
Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .187
Shifting Into Park . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 230
Out of Park . . . . . . . . . . . . . . . . . . . . . . . . . . . . 230
Side Blind Zone Alert (SBZA) . . . . . . . . . . . . . 272
Signals, Turn and Lane-Change . . . . . . . . . . . .138
Software Updates . . . . . . . . . . . . . . . . . . . . . . . . 148
Special Application Services . . . . . . . . . . . . . . 390
Specifications and Capacities . . . . . . . . . . . . . 396
Speedometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
Start Assist, Hill . . . . . . . . . . . . . . . . . . . . . . . . . . 242
Start Vehicle, Remote . . . . . . . . . . . . . . . . . . . . . .14
Starting the Engine . . . . . . . . . . . . . . . . . . . . . . 228
Steering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 215 Heated Wheel . . . . . . . . . . . . . . . . . . . . . . . . . . 96
Wheel Adjustment . . . . . . . . . . . . . . . . . . . . . . 96
Wheel Controls . . . . . . . . . . . . . . . . . . . . . . . . . 96
Steering Column Lock . . . . . . . . . . . . . . . . . . . . . .27
Steering Wheel Controls . . . . . . . . . . . . . . . . . 144 Steps
Power Assist . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Stop/Start System . . . . . . . . . . . . . . . . . . . . . . . 229
Storage Rear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
Storage Areas Armrest . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
Center Console . . . . . . . . . . . . . . . . . . . . . . . . . 91
Convenience Net . . . . . . . . . . . . . . . . . . . . . . . . 93
Floor Console . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
Glove Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
Instrument Panel . . . . . . . . . . . . . . . . . . . . . . . 89
Roof Rack System . . . . . . . . . . . . . . . . . . . . . . . 93
Storage Compartments . . . . . . . . . . . . . . . . . . . 89
Struts Gas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 330
Stuck Vehicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 221
Sun Visors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
Sunroof . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 Navigation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167
System Brake Pad Life . . . . . . . . . . . . . . . . . . . . . . . . . 325
Engine Air Filter Life . . . . . . . . . . . . . . . . . . . 318
Forward Collision Alert (FCA) . . . . . . . . . . . 267
Four Corner Air Suspension . . . . . . . . . . . . 248
Global Positioning . . . . . . . . . . . . . . . . . . . . . 174
Infotainment . . . . . . . . . . . . . . . . . . . . . . . . . . . 409 System (cont'd)
OnStar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 174
Rear Seat Infotainment (RSI) . . . . . . . . . . . 156
Roof Rack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
Systems Driver Assistance . . . . . . . . . . . . . . . . . . . . . . 260
T
Tachometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
Teen Driver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 193
Text Telephone (TTY) Users . . . . . . . . . . . . . . 401
Theft-Deterrent Systems . . . . . . . . . . . . . . . . . . .27Immobilizer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Third-Row Seats . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 339 All-Season . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 340
All-Terrain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 340
Buying New Tires . . . . . . . . . . . . . . . . . . . . . . 351
Chains . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 355
Changing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 356
Designations . . . . . . . . . . . . . . . . . . . . . . . . . . . 342
Different Size . . . . . . . . . . . . . . . . . . . . . . . . . . 352
Full-Size Spare . . . . . . . . . . . . . . . . . . . . . . . . . 366
If a Tire Goes Flat . . . . . . . . . . . . . . . . . . . . . 355
Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 349
Low Profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . 340
Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . 344, 345