
GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-9955992) - 2017 - crc - 5/3/16
Driving and Operating 249
Warning (Continued)
.Clear snow from the base of
the vehicle, especially any
blocking the exhaust pipe.
. Open a window about 5 cm
(2 in) on the vehicle side
that is away from the wind,
to bring in fresh air.
. Fully open the air outlets on
or under the instrument
panel.
. Adjust the climate control
system to circulate the air
inside the vehicle and set
the fan speed to the highest
setting. See “Climate
Control Systems.”
For more information about CO,
see Engine Exhaust 0266.
To save fuel, run the engine for
short periods to warm the vehicle
and then shut the engine off and
partially close the window. Moving
about to keep warm also helps. If it takes time for help to arrive,
when running the engine, push the
accelerator pedal slightly so the
engine runs faster than the idle
speed. This keeps the battery
charged to restart the vehicle and to
signal for help with the headlamps.
Do this as little as possible, to
save fuel.
If the Vehicle Is Stuck
Slowly and cautiously spin the
wheels to free the vehicle when
stuck in sand, mud, ice, or snow.
See
“Rocking the Vehicle to Get It
Out” later in this section.
The Traction Control System (TCS)
can often help to free a stuck
vehicle. See Traction Control/
Electronic Stability Control 0284.
If TCS cannot free the vehicle, see
“Rocking the Vehicle to Get it Out”
following.
{Warning
If the vehicle's tires spin at high
speed, they can explode, and you
or others could be injured. The
vehicle can overheat, causing an
engine compartment fire or other
damage. Spin the wheels as little
as possible and avoid going
above 56 km/h (35 mph).
For information about using tire
chains on the vehicle, see Tire
Chains 0405.
Rocking the Vehicle to Get
It Out
Turn the steering wheel left and
right to clear the area around the
front wheels. For four-wheel-drive
vehicles, shift into Four-Wheel Drive
High. Turn the TCS off. Shift back
and forth between R (Reverse) and
a forward gear, spinning the wheels
as little as possible. To prevent
transmission wear, wait until the
wheels stop spinning before shifting
gears. Slowly spinning the wheels in
the forward and reverse directions 

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-9955992) - 2017 - crc - 5/3/16
462 Customer Information
.Lock-Out Service: Service to
unlock the vehicle if you are
locked out. A remote unlock may
be available if you have
OnStar
®. For security reasons,
the driver must present
identification before this service
is given.
. Emergency Tow from a Public
Road or Highway: Tow to the
nearest GMC dealer for warranty
service, or if the vehicle was in a
crash and cannot be driven.
Assistance is not given when the
vehicle is stuck in the sand,
mud, or snow.
. Flat Tire Change: Service to
change a flat tire with the spare
tire. The spare tire, if equipped,
must be in good condition and
properly inflated. It is the owner's
responsibility for the repair or
replacement of the tire if it is not
covered by the warranty.
. Battery Jump Start: Service to
jump start a dead battery.
. Trip Interruption Benefits and
Assistance: If your trip is
interrupted due to a warranty event, incidental expenses may
be reimbursed within the
Powertrain warranty period.
Items considered are reasonable
and customary hotel, meals,
rental car, or a vehicle being
delivered back to the customer,
up to 805 km (500 mi).
Services Not Included in
Roadside Assistance
.
Impound towing caused by
violation of any laws.
. Legal fines.
. Mounting, dismounting,
or changing of snow tires,
chains, or other traction devices.
Service is not provided if a vehicle
is in an area that is not accessible
to the service vehicle or is not a
regularly traveled or maintained
public road, which includes ice and
winter roads. Off-road use is not
covered.
Services Specific to
Canadian-Purchased Vehicles
. Fuel Delivery: Reimbursement
is up to 7 liters. Diesel fuel
delivery may be restricted.
Propane and other fuels are not
provided through this service.
. Lock-Out Service: Vehicle
registration is required.
. Trip Interruption Benefits and
Assistance: Must be over
150 kilometers from where your
trip was started to qualify.
Pre-authorization, original
detailed receipts, and a copy of
the repair orders are required.
Once authorization has been
received, the Roadside
Assistance advisor will help to
make arrangements and explain
how to receive payment.
. Alternative Service: If
assistance cannot be provided
right away, the Roadside
Assistance advisor may give
permission to get local
emergency road service. You will
receive payment, up to $100,
after sending the original receipt 

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-9955992) - 2017 - crc - 5/3/16
Index 491
Shift Lock Control FunctionCheck, Automatic
Transmission . . . . . . . . . . . . . . . . . . 371
Shifting Into Park . . . . . . . . . . . . . . . . . . . . . . 264
Out of Park . . . . . . . . . . . . . . . . . . . 265
Signals, Turn and
Lane-Change . . . . . . . . . . . . . . . . . 170
Snow Plow . . . . . . . . . . . . . . . . . . . . . 334
Software Updates . . . . . . . . . . . . . . 184
Special Application Services . . . . 444
Specifications and Capacities . . . . . . . . . . . . . . . . . . . . . 453
Speedometer . . . . . . . . . . . . . . . . . . . 125
StabiliTrak OFF Light . . . . . . . . . . . . . . . . . . . . . 137
Start Assist, Hill . . . . . . . . . . . . . . . . . 283
Start Vehicle, Remote . . . . . . . . . . . 33
Starter Switch Check . . . . . . . . . . . 371
Starting the Engine . . . . . . . . . . . . . 260
Steering . . . . . . . . . . . . . . . . . . . . . . . . 240 Fluid, Power . . . . . . . . . . . . . . . . . . 363
Heated Wheel . . . . . . . . . . . . . . . . .114
Wheel Adjustment . . . . . . . . . . . . .113
Wheel Controls . . . . . . . . . . . . . . . .113
Steering System Messages . . . . . 151
Steps Power Assist . . . . . . . . . . . . . . . . . . . 37 Stoplamps and Back-up Lamps
Bulb Replacement . . . . . . . . . . . . 374
Storage Areas Center Console . . . . . . . . . . . . . . . 109
Floor Console . . . . . . . . . . . . . . . . .110
Glove Box . . . . . . . . . . . . . . . . . . . . 108
Instrument Panel . . . . . . . . . . . . . 108
Sunglasses . . . . . . . . . . . . . . . . . . . 109
Storage Compartments . . . . . . . . . 108
Stuck Vehicle . . . . . . . . . . . . . . . . . . . 249
Sun Visors . . . . . . . . . . . . . . . . . . . . . . . 48
Sunglass Storage . . . . . . . . . . . . . . . 109
Sunroof . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Switches Airbag On-Off . . . . . . . . . . . . . . . . . . . 73
Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . 3
System
Forward CollisionAlert (FCA) . . . . . . . . . . . . . . . . . . 293
Infotainment . . . . . . . . . . . . . 176, 470
Noise Control . . . . . . . . . . . . . . . . . 370
Systems Driver Assistance . . . . . . . . . . . . . 290
T
Tachometer . . . . . . . . . . . . . . . . . . . . . 125
Tailgate . . . . . . . . . . . . . . . . . . . . . . . . . . 36 Taillamps
Bulb Replacement . . . . . . . . . . . . 374
Text Telephone (TTY) Users . . . . 460
Theft-Deterrent Systems . . . . . . . . . 40 Immobilizer . . . . . . . . . . . . . . . . . . . . . 40
Throttle, Adjustable . . . . . . . . . . . . . 258
Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115
Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . 383 All-Season . . . . . . . . . . . . . . . . . . . . 384
All-Terrain . . . . . . . . . . . . . . . . . . . . 385
Buying New Tires . . . . . . . . . . . . . 401
Chains . . . . . . . . . . . . . . . . . . . . . . . . 405
Changing . . . . . . . . . . . . . . . . . . . . . 408
Designations . . . . . . . . . . . . . . . . . 388
Different Size . . . . . . . . . . . . . . . . . 402
Full-Size Spare . . . . . . . . . . . . . . . 417
If a Tire Goes Flat . . . . . . . . . . . . 406
Inspection . . . . . . . . . . . . . . . . . . . . 397
Low Profile . . . . . . . . . . . . . . . . . . . 385
Messages . . . . . . . . . . . . . . . . . . . . 151
Pressure . . . . . . . . . . . . . . . . . . . . . . 393
Pressure Light . . . . . . . . . . . . . . . . 138
Pressure Monitor Operation . . 394
Pressure Monitor System . . . . . 393
Rotation . . . . . . . . . . . . . . . . . . . . . . 398
Sidewall Labeling . . . . . . . . . . . . . 385
Terminology and Definitions . . 389