check engine GMC SIERRA 2019 Workshop Manual

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-1500-11698638) - 2019 - CRC - 5/13/19
Service and Maintenance 425
Maintenance Schedule
Additional Required
Services - Severe12 000 km/7,500 mi
24 000 km/15,000 mi
36 000 km/22,500 mi
48 000 km/30,000 mi
60 000 km/37,500 mi
72 000 km/45,000 mi
84 000 km/52,500 mi
96 000 km/60,000 mi
108 000 km/67,500 mi
120 000 km/75,000 mi
132 000 km/82,500 mi
144 000 km/90,000 mi
156 000 km/97,500 mi
168 000 km/105,000 mi 180 000 km/112,500 mi
192 000 km/120,000 mi
204 000 km/127,500 mi
216 000 km/135,000 mi
228 000 km/142,500 mi
240 000 km/150,000 mi
Rotate tires and perform Required Services.
Check engine oil level and oil life percentage.
Change engine oil and filter, if needed. Check
engine air filter life percentage and status.
Change engine air filter, if needed.
@ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @
Replace passenger compartment air filter. (1)@ @@@@@
If the vehicle is not equipped with the engine air
filter life system, replace engine air cleaner
filter. (2)@ @@
Inspect evaporative control system. (3)@@@
Replace spark plugs. Inspect spark plug wires.
(Except 2.7L L4 Turbo Engine)@
Replace spark plugs. Inspect spark plug wires.
(2.7L L4 Turbo Engine Only)@ @
Change automatic transmission fluid and filter.@@@
Change transfer case fluid, if equipped with
4WD. (4)@@@
Drain and fill engine cooling system. (5)@
Visually inspect accessory drive belts. (6)@
Replace brake fluid. (7)
Replace windshield wiper blades. (8)
@ @@
@@ @
@ @@ @
Replace hood and/or body lift support gas struts.@
@

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-1500-11698638) - 2019 - CRC - 5/13/19
426 Service and Maintenance
Footnotes—Maintenance
Schedule Additional Required
Services - Severe
(1) Or every two years, whichever
comes first. More frequent
replacement may be needed if the
vehicle is driven in areas with heavy
traffic, poor air quality, areas with
high dust levels or are sensitive to
environmental allergens. Filter
replacement may also be needed if
you notice reduced airflow, windows
fogging up, or odors. Your local GM
Service location can help you
determine when it is the right time to
replace your filter.
(2) Or every four years, whichever
comes first. If driving in dusty
conditions, inspect the filter at each
oil change or more often as needed.
See Engine Air Cleaner/Filter 0331.
(3) Visually check all fuel and vapor
lines and hoses for proper
attachment, connection, routing, and
condition. (4)
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 drive axles and
should be replaced.
(5) Or every five years, whichever
comes first. See Cooling System
0 332.
(6) Or every 10 years, whichever
comes first. Inspect for fraying,
excessive cracking, or damage;
replace, if needed.
(7) Replace brake fluid every five
years. See Brake Fluid 0341.
(8) Or every 12 months, whichever
comes first. See Wiper Blade
Replacement 0349.Special Application
Services
.
Severe Commercial Use
Vehicles Only: Lubricate chassis
components every oil change.
. Have underbody flushing service
performed. See "Underbody
Maintenance" in Exterior Care
0 408.

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-1500-11698638) - 2019 - CRC - 5/13/19
Service and Maintenance 427
Additional
Maintenance and Care
Your vehicle is an important
investment and caring for it properly
may help to avoid future costly
repairs. To maintain vehicle
performance, additional
maintenance services may be
required.
It is recommended that your dealer
perform these services—their
trained dealer technicians know
your vehicle best. Your dealer can
also perform a thorough
assessment with a multi-point
inspection to recommend when your
vehicle may need attention.
The following list is intended to
explain the services and conditions
to look for that may indicate
services are required.
Battery
The 12-volt battery supplies power
to start the engine and operate any
additional electrical accessories. .
To avoid break-down or failure to
start the vehicle, maintain a
battery with full cranking power.
. Trained dealer technicians have
the diagnostic equipment to test
the battery and ensure that the
connections and cables are
corrosion-free.
Belts
. Belts may need replacing if they
squeak or show signs of
cracking or splitting.
. Trained dealer technicians have
access to tools and equipment
to inspect the belts and
recommend adjustment or
replacement when necessary.
Brakes
Brakes stop the vehicle and are
crucial to safe driving.
. Signs of brake wear may include
chirping, grinding, or squealing
noises, or difficulty stopping. .
Trained dealer technicians have
access to tools and equipment
to inspect the brakes and
recommend quality parts
engineered for the vehicle.
Fluids
Proper fluid levels and approved
fluids protect the vehicle’s systems
and components. See
Recommended Fluids and
Lubricants 0430 for GM approved
fluids.
. Engine oil and windshield
washer fluid levels should be
checked at every fuel fill.
. Instrument cluster lights may
come on to indicate that fluids
may be low and need to be
filled.
Hoses
Hoses transport fluids and should
be regularly inspected to ensure
that there are no cracks or leaks.
With a multi-point inspection, your
dealer can inspect the hoses and
advise if replacement is needed.

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-1500-11698638) - 2019 - CRC - 5/13/19
436 Technical Data
ApplicationCapacities
Metric English
5.3L V8; 6.2L V8 1500 Series 7.6 L 8.0 qt
Fuel Tank 1500 Series Standard and Short Box (Gas & 4WD Diesel) 90.9 L 24.0 gal
1500 Series Standard and Short Box (2WD Diesel) 83.3 L 22.0 gal
1500 Series Long Box 106.0 L 28.0 gal
Transfer Case Fluid 1.5 L 1.6 qt
Wheel Nut Torque 190 Y140 lb ft
All capacities are approximate. When adding, be sure to fill to the approximate level, as recommended in this
manual. Recheck fluid level after filling.
Engine Specifications
Engine VIN CodeSpark Plug Gap
2.7L L4 (L3B) K0.65–0.75 mm (0.026–0.030 in)
4.3L V6 (LV3) H0.95–1.10 mm (0.037–0.043 in)
5.3L V8 (L82) F0.95–1.10 mm (0.037–0.043 in)
5.3L V8 (L84) D0.95–1.10 mm (0.037–0.043 in)
6.2L V8 (L87) L0.95–1.10 mm (0.037–0.043 in)

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/-
Mexico-1500-11698638) - 2019 - CRC - 5/13/19
464 Index
IndexA
Accessories andModifications . . . . . . . . . . . . . . . . . . 318
Accessory Power . . . . . . . . . . . . . . . 228
Active Fuel Management . . . . . . . 231
Add-On Electrical Equipment . . . 311
Adding a Snow Plow or Similar Equipment . . . . . . . . . . . . . 312
Additional Information OnStar . . . . . . . . . . . . . . . . . . . . . . . 454
Additional Maintenance and Care . . . . . . . . . . . . . . . . . . . . . . 427
Adjustments Lumbar, Front Seats . . . . . . . . . . . . 72
Air Cleaner/Filter, Engine . . . . . . . 331
Air Conditioning . . . . . . . . . . . 191, 193
Air Filter Life System . . . . . . . . . . . . . . . . . . . 330
Air Filter, Passenger
Compartment . . . . . . . . . . . . . . . . . 197
Air Vents . . . . . . . . . . . . . . . . . . . . . . . 197
Airbag System Check . . . . . . . . . . . . . . . . . . . . . . . . . . 99
How Does an AirbagRestrain? . . . . . . . . . . . . . . . . . . . . . 91
Passenger Sensing System . . . . 93
What Makes an Airbag Inflate? . . . . . . . . . . . . . . . . . . . . . . . . 91 Airbag System (cont'd)
What Will You See after an
Airbag Inflates? . . . . . . . . . . . . . . . 92
When Should an Airbag
Inflate? . . . . . . . . . . . . . . . . . . . . . . . . 90
Where Are the Airbags? . . . . . . . . 89
Airbags Adding Equipment to theVehicle . . . . . . . . . . . . . . . . . . . . . . . . 98
Passenger Status Indicator . . . 150
Readiness Light . . . . . . . . . . . . . . 149
Servicing Airbag-Equipped Vehicles . . . . . . . . . . . . . . . . . . . . . . . 97
System Check . . . . . . . . . . . . . . . . . . 87
Alarm Vehicle Security . . . . . . . . . . . . . . . . 55
Alert Lane Change . . . . . . . . . . . . . . . . . 272
Side Blind Zone (SBZA) . . . . . . 271
All-Season Tires . . . . . . . . . . . . . . . . 364
All-Terrain Tires . . . . . . . . . . . . . . . . . 365
Antilock Brake System (ABS) . . . 244 Warning Light . . . . . . . . . . . . . . . . . 155
Appearance Care Exterior . . . . . . . . . . . . . . . . . . . . . . . 408
Interior . . . . . . . . . . . . . . . . . . . . . . . . 413
Assistance Program, Roadside . . . . . . . . . . . . . . . . . . . . . . 442

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/-
Mexico-1500-11698638) - 2019 - CRC - 5/13/19
466 Index
ChargingWireless . . . . . . . . . . . . . . . . . . . . . . 137
Charging System Light . . . . . . . . . 151
Check Engine Light (MalfunctionIndicator) . . . . . . . . . . . . . . . . . . . . 151
Ignition Transmission Lock . . . 348
Child Restraints Infants and Young Children . . . 101
Lower Anchors and Tethersfor Children . . . . . . . . . . . . . . . . . 107
Older Children . . . . . . . . . . . . . . . . 100
Securing . . . . . . . . . . . . . . . . . 118, 122
Systems . . . . . . . . . . . . . . . . . . . . . . 104
Circuit Breakers . . . . . . . . . . . . . . . . 355
Cleaning Exterior Care . . . . . . . . . . . . . . . . . 408
Interior Care . . . . . . . . . . . . . . . . . . 413
Climate Control Systems . . . . . . . 191 Air Conditioning . . . . . . . . . . . . . . 191
Dual Automatic . . . . . . . . . . . . . . . 193
Heating . . . . . . . . . . . . . . . . . . . . . . . 191
Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . 134
Cluster, Instrument . . . . . . . . . . . . . 140
Collision Damage Repair . . . . . . . 445
Compartments Storage . . . . . . . . . . . . . . . . . . . . . . . 126
Compass . . . . . . . . . . . . . . . . . . . . . . . 134 Connected Services
Connections . . . . . . . . . . . . . . . . . . 461
Diagnostics . . . . . . . . . . . . . . . . . . . 463
Navigation . . . . . . . . . . . . . . . . . . . . 460
Connections Connected Services . . . . . . . . . . 461
Control
Hill Descent . . . . . . . . . . . . . . . . . . 249
Traction and ElectronicStability . . . . . . . . . . . . . . . . . . . . . 247
Control Light
Hill Descent . . . . . . . . . . . . . . . . . . 156
Control of a Vehicle . . . . . . . . . . . . . 201
Convex Mirrors . . . . . . . . . . . . . . . . . . 57
Coolant Engine Temperature Gauge . . 147
Engine Temperature
Warning Light . . . . . . . . . . . . . . . 158
Cooling . . . . . . . . . . . . . . . . . . . . 191, 193
Cooling System . . . . . . . . . . . . . . . . . 332
Courtesy Transportation Program . . . . . . . . . . . . . . . . . . . . . . . 444
Cruise Control . . . . . . . . . . . . . . . . . . 255 Light . . . . . . . . . . . . . . . . . . . . . . . . . . 161
Cupholders . . . . . . . . . . . . . . . . . . . . . 126
Customer Assistance . . . . . . . . . . . 441
Offices . . . . . . . . . . . . . . . . . . . . . . . . 440 Customer Assistance (cont'd)
Text Telephone (TTY)
Users . . . . . . . . . . . . . . . . . . . . . . . 441
Customer Information
Publications OrderingInformation . . . . . . . . . . . . . . . . . . 447
Customer Satisfaction Procedure . . . . . . . . . . . . . . . . . . . . . 438
D
Damage Repair, Collision . . . . . . . 445
Danger, Warning, and Caution . . . . 3
Data CollectionInfotainment System . . . . . . . . . . 451
OnStar . . . . . . . . . . . . . . . . . . . . . . . 451
Data Recorders, Event . . . . . . . . . 450
Daytime Running Lamps (DRL) . . . . . . . . . . . . . . . . . . 182
Defensive Driving . . . . . . . . . . . . . . . 201
Delayed Locking . . . . . . . . . . . . . . . . . 46
Diagnostics
Connected Services . . . . . . . . . . 463
Differential, Limited-Slip . . . . . . . . 255
Distracted Driving . . . . . . . . . . . . . . . 200
Dome Lamps . . . . . . . . . . . . . . . . . . . 186
Door Ajar Light . . . . . . . . . . . . . . . . . . . . . 161
Delayed Locking . . . . . . . . . . . . . . . . 46

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/-
Mexico-1500-11698638) - 2019 - CRC - 5/13/19
Index 467
Door (cont'd)Locks . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Power Locks . . . . . . . . . . . . . . . . . . . . 46
Drive Belt Routing, Engine . . . . . . 437
Driver Assistance Systems . . . . . 258
Driver Information
Center (DIC) . . . . . . . . . . . . . 161, 163
Driver Mode Control . . . . . . . . . . . . 250
Driver Mode Control Light . . . . . . 158
Driving Assistance Systems . . . . . . . . . . 265
Characteristics andTowing Tips . . . . . . . . . . . . . . . . . 281
Defensive . . . . . . . . . . . . . . . . . . . . . 201
Drunk . . . . . . . . . . . . . . . . . . . . . . . . . 201
For Better Fuel Economy . . . . . . . 30
Hill and Mountain Roads . . . . . . 209
If the Vehicle is Stuck . . . . . . . . . .211
Loss of Control . . . . . . . . . . . . . . . 203
Off-Road . . . . . . . . . . . . . . . . . . . . . 203
Off-Road Recovery . . . . . . . . . . . 202
Vehicle Load Limits . . . . . . . . . . . 212
Wet Roads . . . . . . . . . . . . . . . . . . . 208
Winter . . . . . . . . . . . . . . . . . . . . . . . . 210
Dual Automatic Climate Control System . . . . . . . . . . . . . . . . 193E
E85 or FlexFuel . . . . . . . . . . . . . . . . 278
Electric Parking Brake . . . . . . . . . . 245
Electric Parking Brake Light . . . . 154
Electrical Equipment,Add-On . . . . . . . . . . . . . . . . . . . . . . . 311
Electrical System Engine Compartment FuseBlock . . . . . . . . . . . . . . . . . . . . . . . . 355
Fuses and Circuit Breakers . . . 355
Instrument Panel Fuse
Block . . . . . . . . . . . . . . . . . . . 359, 361
Overload . . . . . . . . . . . . . . . . . . . . . 354
Electronic Stability Control
(ESC) Off Light . . . . . . . . . . . . . . . . 157
Emergency OnStar . . . . . . . . . . . . . . . . . . . . . . . 453
Engine Air Cleaner/Filter . . . . . . . . . . . . . 331
Check Light (Malfunction
Indicator) . . . . . . . . . . . . . . . . . . . . 151
Compartment Overview . . . . . . . 321
Coolant Temperature Gauge . . . . . . . . . . . . . . . . . . . . . . 147
Coolant Temperature Warning Light . . . . . . . . . . . . . . . 158
Cooling System . . . . . . . . . . . . . . . 332
Drive Belt Routing . . . . . . . . . . . . 437 Engine (cont'd)
Exhaust . . . . . . . . . . . . . . . . . . . . . . 232
Fan . . . . . . . . . . . . . . . . . . . . . . . . . . . 338
Heater . . . . . . . . . . . . . . . . . . . . . . . . 227
Oil Life System . . . . . . . . . . . . . . . 328
Oil Pressure Gauge . . . . . . . . . . 146
Oil Pressure Light . . . . . . . . . . . . 159
Overheated Protection
Operating Mode . . . . . . . . . . . . . 338
Overheating . . . . . . . . . . . . . . . . . . 336
Power Messages . . . . . . . . . . . . . 169
Running While Parked . . . . . . . . 232
Starting . . . . . . . . . . . . . . . . . . . . . . . 224
Engine Air Filter Life System . . . . 330
Entry Lighting . . . . . . . . . . . . . . . . . . . 187
Equipment, Towing . . . . . . . . . . . . . 290
Event Data Recorders . . . . . . . . . . 450
Exit Lighting . . . . . . . . . . . . . . . . . . . . 187
Extended Parking . . . . . . . . . . . . . . . 231
Extender, Seat Belt . . . . . . . . . . . . . . 85
Exterior Cargo Lamps . . . . . . . . . . 185
Exterior Lamp Controls . . . . . . . . . 179
Exterior Lamps Off Reminder . . . 181
Exterior Lighting Battery
Saver . . . . . . . . . . . . . . . . . . . . . . . . . 188

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/-
Mexico-1500-11698638) - 2019 - CRC - 5/13/19
Index 469
H
Halogen Bulbs . . . . . . . . . . . . . . . . . . 351
Hazard Warning Flashers . . . . . . . 183
Head Restraints . . . . . . . . . . . . . . . . . 69
Head-up Display . . . . . . . . . . . . . . . . 166
HeadlampsAiming . . . . . . . . . . . . . . . . . . . . . . . . 351
Automatic . . . . . . . . . . . . . . . . . . . . . 182
Bulb Replacement . . . . . . . . . . . . 351
Daytime RunningLamps (DRL) . . . . . . . . . . . . . . . . 182
Flash-to-Pass . . . . . . . . . . . . . . . . . 182
Headlamps, Front Turn Signal, Sidemarker, and
Parking Lamps . . . . . . . . . . . . . . 352
High-Beam On Light . . . . . . . . . . 160
High/Low Beam Changer . . . . . 181
Lamps On Reminder . . . . . . . . . 161
Heated
Rear Seats . . . . . . . . . . . . . . . . . . . . . 79
Steering Wheel . . . . . . . . . . . . . . . 133
Heated and Ventilated Front Seats . . . . . . . . . . . . . . . . . . . . . . . . . . 76
Heated Mirrors . . . . . . . . . . . . . . . . . . . 59
Heater
Engine . . . . . . . . . . . . . . . . . . . . . . . . 227
Heating . . . . . . . . . . . . . . . . . . . . 191, 193
High-Beam On Light . . . . . . . . . . . . 160 High-Speed Operation . . . . . . . . . . 373
Hill and Mountain Roads . . . . . . . . 209
Hill Descent Control (HDC) . . . . . 249
Hill Descent Control Light . . . . . . . 156
Hill Start Assist (HSA) . . . . . . . . . . 247
Hood . . . . . . . . . . . . . . . . . . . . . . . . . . . 319
Horn . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133
How to Wear Seat Belts
Properly . . . . . . . . . . . . . . . . . . . . . . . . 81
HVAC . . . . . . . . . . . . . . . . . . . . . . 191, 193
I
Ignition Positions . . . . . . . . . . 220, 222
Ignition Transmission Lock Check . . . . . . . . . . . . . . . . . . . . . . . . . 348
Immobilizer . . . . . . . . . . . . . . . . . . . . . . 56
Indicator Pedestrian Ahead . . . . . . . . . . . . 156
Vehicle Ahead . . . . . . . . . . . . . . . . 156
Infants and Young Children, Restraints . . . . . . . . . . . . . . . . . . . . . 101
Information Publication Ordering . . . . . . . . . . 447
Infotainment . . . . . . . . . . . . . . . . . . . . 190
Infotainment System . . . . . . . . . . . . 451
Instrument Cluster . . . . . . . . . . . . . . 140
Interior Rearview Mirrors . . . . . . . . . 61
Introduction . . . . . . . . . . . . . . . . . . . . . . . 2
J
Jump Starting - North America . . . . . . . . . . . . . . . . . . . . . . . 400
K
Keyless EntryRemote (RKE) System . . . . . 34, 42
Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
L
Labeling, Tire Sidewall . . . . . . . . . . 365
Lamps Daytime Running (DRL) . . . . . . 182
Dome . . . . . . . . . . . . . . . . . . . . . . . . . 186
Exterior Cargo . . . . . . . . . . . . . . . . 185
Exterior Controls . . . . . . . . . . . . . . 179
Exterior Lamps OffReminder . . . . . . . . . . . . . . . . . . . 181
Exterior Lighting Battery Saver . . . . . . . . . . . . . . . . . . . . . . . 188
License Plate . . . . . . . . . . . . . . . . . 354
Malfunction Indicator
(Check Engine) . . . . . . . . . . . . . 151
On Reminder . . . . . . . . . . . . . . . . . 161
Reading . . . . . . . . . . . . . . . . . . . . . . 187
Lane Change Alert (LCA) . . . . . . . 272
Lane Departure Warning (LDW) . . . . . . . . . . . . . . . . 274
Lane Keep Assist (LKA) . . . . . . . . 274

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/-
Mexico-1500-11698638) - 2019 - CRC - 5/13/19
470 Index
Lane Keep Assist Light . . . . . . . . . 156
Lap-Shoulder Belt . . . . . . . . . . . . . . . 83
LATCH SystemReplacing Parts after aCrash . . . . . . . . . . . . . . . . . . . . . . . .118
LATCH, Lower Anchors and Tethers for Children . . . . . . . . . . . 107
LED Lighting . . . . . . . . . . . . . . . . . . . . 352
Lighting Entry . . . . . . . . . . . . . . . . . . . . . . . . . 187
Exit . . . . . . . . . . . . . . . . . . . . . . . . . . . 187
Illumination Control . . . . . . . . . . . 186
LED . . . . . . . . . . . . . . . . . . . . . . . . . . 352
Task . . . . . . . . . . . . . . . . . . . . . . . . . . 185
Lights Airbag Readiness . . . . . . . . . . . . . 149
Antilock Brake System
(ABS) Warning . . . . . . . . . . . . . . 155
Brake System Warning . . . . . . . 153
Charging System . . . . . . . . . . . . . 151
Check Engine (Malfunction Indicator) . . . . . . . . . . . . . . . . . . . . 151
Cruise Control . . . . . . . . . . . . . . . . 161
Door Ajar . . . . . . . . . . . . . . . . . . . . . 161
Driver Mode Control . . . . . . . . . . 158
Electric Parking Brake . . . . . . . . 154
Electronic Stability Control (ESC), Off . . . . . . . . . . . . . . . . . . . 157 Lights (cont'd)
Engine Coolant
Temperature Warning . . . . . . . 158
Engine Oil Pressure . . . . . . . . . . 159
Flash-to-Pass . . . . . . . . . . . . . . . . . 182
Four-Wheel-Drive . . . . . . . . . . . . . 155
Front Fog Lamp . . . . . . . . . . . . . . 160
High-Beam On . . . . . . . . . . . . . . . . 160
High/Low Beam Changer . . . . . 181
Hill Descent Control . . . . . . . . . . 156
Lane Keep Assist . . . . . . . . . . . . . 156
Low Fuel Warning . . . . . . . . . . . . 160
Seat Belt Reminders . . . . . . . . . . 149
Security . . . . . . . . . . . . . . . . . . . . . . 160
Service Electric Parking
Brake . . . . . . . . . . . . . . . . . . . . . . . 154
Tire Pressure . . . . . . . . . . . . . . . . . 159
Tow/Haul Mode . . . . . . . . . . . . . . . 155
Traction Off . . . . . . . . . . . . . . . . . . . 157
Limited-Slip Differential . . . . . . . . . 255
Locking Rear Axle . . . . . . . . . . . . . . 255
Locks Automatic Door . . . . . . . . . . . . . . . . . 47
Delayed Locking . . . . . . . . . . . . . . . . 46
Door . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Lockout Protection . . . . . . . . . . . . . . 47
Power Door . . . . . . . . . . . . . . . . . . . . . 46
Safety . . . . . . . . . . . . . . . . . . . . . . . . . . 47 Loss of Control . . . . . . . . . . . . . . . . . 203
Low Fuel Warning Light . . . . . . . . . 160
Low-Profile Tires . . . . . . . . . . . . . . . . 365
Lower Anchors and Tethers
for Children (LATCH
System) . . . . . . . . . . . . . . . . . . . . . . . 107
Lumbar Adjustment . . . . . . . . . . . . . . 72
Front Seats . . . . . . . . . . . . . . . . . . . . . 72
M
MaintenanceRecords . . . . . . . . . . . . . . . . . . . . . . 433
Maintenance and Care Additional . . . . . . . . . . . . . . . . . . . . . 427
Maintenance Schedule . . . . . . . . . 420 Recommended Fluids andLubricants . . . . . . . . . . . . . . . . . . . 430
Transfer Case . . . . . . . . . . . . . . . . 239
Malfunction Indicator Lamp . . . . . 151
Manual Mirrors . . . . . . . . . . . . . . . . . . 57
Manual Mode . . . . . . . . . . . . . . . . . . . 235
Manual Windows . . . . . . . . . . . . . . . . 64
Memory Features . . . . . . . . . . . . . . . . 13
Memory Seats . . . . . . . . . . . . . . . . . . . 74
Messages Engine Power . . . . . . . . . . . . . . . . 169
Vehicle . . . . . . . . . . . . . . . . . . . . . . . 169
Vehicle Speed . . . . . . . . . . . . . . . . 170

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/-
Mexico-1500-11698638) - 2019 - CRC - 5/13/19
Index 471
MirrorRear Camera . . . . . . . . . . . . . . . . . . . 61
Mirrors Automatic Dimming . . . . . . . . . . . . . 59
Automatic DimmingRearview . . . . . . . . . . . . . . . . . . . . . . 61
Blind Spot . . . . . . . . . . . . . . . . . . . . . . 59
Convex . . . . . . . . . . . . . . . . . . . . . . . . . 57
Folding . . . . . . . . . . . . . . . . . . . . . . . . . 58
Heated . . . . . . . . . . . . . . . . . . . . . . . . . 59
Manual . . . . . . . . . . . . . . . . . . . . . . . . . 57
Manual Rearview . . . . . . . . . . . . . . . 61
Power . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Tilt in Reverse . . . . . . . . . . . . . . . . . . 60
Mirrors, Interior Rearview . . . . . . . . 61
Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . 250 Driver Control . . . . . . . . . . . . . . . . . 250
Monitor System, Tire Pressure . . . . . . . . . . . . . . . . . . . . . . 374
N
NavigationConnected Services . . . . . . . . . . 460
New Vehicle Break-In . . . . . . . . . . . 220
Noise Control System . . . . . . . . . . 347
O
Odometer . . . . . . . . . . . . . . . . . . . . . . . 145 Trip . . . . . . . . . . . . . . . . . . . . . . . . . . . 145
Off-Road . . . . . . . . . . . . . . . . . . . . . . . 203 Driving . . . . . . . . . . . . . . . . . . . . . . . . 203
Recovery . . . . . . . . . . . . . . . . . . . . . 202
Oil Engine . . . . . . . . . . . . . . . . . . . . . . . . 326
Engine Oil Life System . . . . . . . 328
Engine Oil Pressure Gauge . . . 146
Pressure Light . . . . . . . . . . . . . . . . 159
Older Children, Restraints . . . . . . 100
Online Owner Center . . . . . . . . . . . 441
OnStar . . . . . . . . . . . . . . . . . . . . . . . . . 451
OnStar Additional Information . . . . . . . . . . . . . . . . . . . . 454
OnStar Emergency . . . . . . . . . . . . . 453
OnStar Overview . . . . . . . . . . . . . . . 452
OnStar Security . . . . . . . . . . . . . . . . 454
Operating Mode Overheated EngineProtection . . . . . . . . . . . . . . . . . . . 338
Operation Fog Lamps . . . . . . . . . . . . . . . . . . . 184
Outlets Power . . . . . . . . . . . . . . . . . . . . . . . . 134 Overheated Engine
Protection Operating Mode . . . . 338
Overheating, Engine . . . . . . . . . . . . 336
P
Park Shifting Into . . . . . . . . . . . . . . . . . . . 229
Shifting Out of . . . . . . . . . . . . . . . . 230
Park Assist . . . . . . . . . . . . . . . . . . . . . 259
Parking Brake and P (Park)Mechanism Check . . . . . . . . . . 348
Extended . . . . . . . . . . . . . . . . . . . . . 231
Over Things That Burn . . . . . . . 231
Parking or Backing Assistance Systems . . . . . . . . . . 259
Passenger Airbag Status
Indicator . . . . . . . . . . . . . . . . . . . . . . 150
Passenger Compartment Air Filter . . . . . . . . . . . . . . . . . . . . . . . . . . 197
Passenger Sensing System . . . . . 93
Pedestrian Ahead Indicator . . . . . 156
Perchlorate Materials
Requirements, California . . . . . . 318
Personalization Vehicle . . . . . . . . . . . . . . . . . . . . . . . 170
Pickup Conversion to Chassis Cab . . . . . . . . . . . . . . . . . . 315