GMC Sierra/Sierra Denali 1500 Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-15883563) - 2022 - CRC - 11/19/21
224 Driving and Operating
Service Mode
This power mode is available for service and
diagnostics, and to verify the proper
operation of the malfunction indicator lamp
as may be required for emission inspection
purposes. With the vehicle off, and the
brake pedal not applied, pressing and
holding the ENGINE START/STOP button for
more than five seconds will place the vehicle
in Service Mode. The instruments and audio
systems will operate as they do when the
vehicle is on, but the vehicle will not be able
to be driven. The engine will not start in
Service Mode. Press the ENGINE START/STOP
button again to turn the vehicle off.
Starting the Engine
If the vehicle has a diesel engine, see the
Duramax diesel supplement.
Caution
If you add electrical parts or accessories,
you could change the way the engine
operates. Any resulting damage would
not be covered by the vehicle warranty.
SeeAdd-On Electrical Equipment 0338. Move the shift lever to P (Park) or
N (Neutral). To restart the engine when the
vehicle is already moving, use
N (Neutral) only.
Caution
Do not try to shift to P (Park) if the
vehicle is moving. If you do, you could
damage the transmission. Shift to P (Park)
only when the vehicle is stopped.
Starting Procedure
1. The remote key must be in the vehicle.
Press ENGINE START/STOP with the brake
pedal applied. When the engine begins
cranking, let go of the button.
The driver may observe a minor, and
temporary, brake pedal kickback when
starting the vehicle. This is normal.
The idle speed will go down as the
engine gets warm. Do not race the
engine immediately after starting it.
Operate the engine and transmission
gently to allow the oil to warm up and
lubricate all moving parts. When the low fuel warning light is on
and the FUEL LEVEL LOW message is
displayed in the Driver Information
Center (DIC), press ENGINE START/STOP
to continue engine cranking.
Caution
Cranking the engine for long periods of
time, by returning the ignition to the
START position immediately after
cranking has ended, can overheat and
damage the cranking motor, and drain
the battery. Wait at least 15 seconds
between each try, to let the cranking
motor cool down.
2. If the engine does not start after five to 10 seconds, especially in very cold
weather (below −18 °C or 0 °F), it could
be flooded with too much gasoline. Try
pushing the accelerator pedal all the way
to the floor and holding it there while
pressing ENGINE START/STOP for up to a
maximum of 15 seconds. Wait at least
15 seconds between each try, to allow
the cranking motor to cool down. When
the engine starts, let go of the button
and accelerator. If the vehicle starts
briefly but then stops again, do the
same thing. This clears the extra gasoline
GMC Sierra/Sierra Denali 1500 Owner Manual (GMNA-Localizing-U.S./Cana-
da/Mexico-15883563) - 2022 - CRC - 11/19/21
466 Index
Heated (cont'd)Steering Wheel . . . . . . . . . . . . . . . . . . . . . . . . 102
Heated and Ventilated Front Seats . . . . . . . .52
Heated Mirrors . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Heater Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 225
Heating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 196, 198
High-Beam On Light . . . . . . . . . . . . . . . . . . . . . . 127
Hill and Mountain Roads . . . . . . . . . . . . . . . . . 213
Hill Descent Control (HDC) . . . . . . . . . . . . . . . 249
Hill Descent Control Light . . . . . . . . . . . . . . . . . 122
Hill Start Assist (HSA) . . . . . . . . . . . . . . . . . . . . 247
Hood . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 343
Horn . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
How to Wear Seat Belts Properly . . . . . . . . . 56
HVAC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 196, 198
I
Ignition Positions . . . . . . . . . . . . . . . . . . . . . . . . 222
Immobilizer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
Indicator Pedestrian Ahead . . . . . . . . . . . . . . . . . . . . . . 123
Vehicle Ahead . . . . . . . . . . . . . . . . . . . . . . . . . 123
Infants and Young Children, Restraints . . . . .73
Information Publication Ordering . . . . . . . . . . . . . . . . . . . 449
Infotainment System . . . . . . . . . . . . . . . . . . . . 452
Instrument Cluster . . . . . . . . . . . . . . . . . . . 109, 110 Instrument Panel Overview . . . . . . . . . . . . . . . . 4
Interior Rearview Mirrors . . . . . . . . . . . . . . . . . .37
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . 1, 155
J
Jump Starting - North America . . . . . . . . . . . 407
K
Keyless Entry
Remote (RKE) System . . . . . . . . . . . . . . . . . . . 14
Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
L
Labeling, Tire Sidewall . . . . . . . . . . . . . . . . . . . 379
Lamps Auxiliary Roof Mounted Lamp . . . . . . . . . 150
Daytime Running (DRL) . . . . . . . . . . . . . . . . 147
Dome . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152
Exterior Cargo . . . . . . . . . . . . . . . . . . . . . . . . . . 151
Exterior Controls . . . . . . . . . . . . . . . . . . . . . . . 145
Exterior Lamps Off Reminder . . . . . . . . . . 147
Exterior Lighting Battery Saver . . . . . . . . 154
License Plate . . . . . . . . . . . . . . . . . . . . . . . . . . . 368
Malfunction Indicator (CheckEngine) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119
On Reminder . . . . . . . . . . . . . . . . . . . . . . . . . . . 127
Reading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153
Lane Change Alert (LCA) . . . . . . . . . . . . . . . . . 299
Lane Departure Warning (LDW) . . . . . . . . . . 301 Lane Keep Assist (LKA) . . . . . . . . . . . . . . . . . . . 302
Lane Keep Assist Light . . . . . . . . . . . . . . . . . . . . 123
Lap-Shoulder Belt . . . . . . . . . . . . . . . . . . . . . . . . . 58
LATCH System
Replacing Parts after a Crash . . . . . . . . . . . 89
LATCH, Lower Anchors and Tethers for Children . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
LED Lighting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 366
Lighting Entry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153
Exit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153
Illumination Control . . . . . . . . . . . . . . . . . . . 152
LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 366
Task . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150
Lights Airbag Readiness . . . . . . . . . . . . . . . . . . . . . . . 118
Antilock Brake System (ABS)
Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122
Brake System Warning . . . . . . . . . . . . . . . . . 121
Charging System . . . . . . . . . . . . . . . . . . . . . . . 119
Check Engine (Malfunction Indicator) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119
Cruise Control . . . . . . . . . . . . . . . . . . . . . . . . . 128
Door Ajar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128
Driver Mode Control . . . . . . . . . . . . . . . . . . . 125
Electric Parking Brake . . . . . . . . . . . . . . . . . . . 121
Engine Coolant Temperature Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125