
GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-1500-11698638) - 2019 - CRC - 5/14/19
158 Instruments and Controls
This light comes on when the ESC
system is turned off. If ESC is off,
the Traction Control System (TCS)
is also off.
If the ESC and TCS are off, the
system does not assist in controlling
the vehicle. Turn on the TCS and
the ESC systems and the warning
light turns off.
SeeTraction Control/Electronic
Stability Control 0247.
Engine Coolant
Temperature Warning
Light
This light comes on briefly while
starting the vehicle. If it does not, have the vehicle
serviced by your dealer. If the
system is working normally the
indicator light goes off.
Caution
The engine coolant temperature
warning light indicates that the
vehicle has overheated. Driving
with this light on can damage the
engine and it may not be covered
by the vehicle warranty. See
Engine Overheating
0336.
The engine coolant temperature
warning light comes on when the
engine has overheated.
If this happens, pull over and turn
off the engine as soon as possible.
See Engine Overheating 0336.
Driver Mode Control Light
This light comes on when Sport
Mode is selected.
This light comes on when Snow
Mode is selected.
This light comes on when Terrain
Mode is selected.

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-1500-11698638) - 2019 - CRC - 5/14/19
250 Driving and Operating
HDC can maintain vehicle speeds
between 1 and 22 km/h (1 and
14 mph) on grades greater than or
equal to 10%.
If HDC is to be used for more than
three minutes or on grades steeper
than 25%, the transfer case should
be put into Four-Wheel Drive Low
(4
n) to reduce the possibility of
brake overheating.
Noise from the Electronic Brake
Control Module (EBCM) is normal
when HDC is active.
When HDC is activated, the initial
HDC speed is set to the current
driving speed. It can be increased or
decreased by pressing +RES or
SET- on the steering wheel, or by
applying the accelerator or brake
pedal. This adjusted speed
becomes the new set speed.
HDC will remain enabled between
30 and 60 km/h (19 and 37 mph);
however, vehicle speed cannot be
set or maintained in this range. HDC
will automatically disable if the vehicle speed is above 80 km/h
(50 mph) or above 60 km/h
(37 mph) for at least 30 seconds.
5must be pressed again to
re-enable HDC. HDC may disable
after an extended period of use.
If this happens, HDC will require
time to cool down. The length of
time HDC remains active depends
on road conditions, grade, set
speed, vehicle loading, and outside
temperature.
When enabled, if the vehicle speed
is above 30 km/h (19 mph) and
below 60 km/h (37 mph), a DIC
message will display.
Driver Mode Control
This feature adds a sportier feel,
provides a more comfortable ride,
or assists in different weather
conditions or terrain to optimize
driving performance. Depending on
the option package, available
features, and mode selected, the
suspension, steering, and
powertrain will change settings to
achieve the desired mode characteristics. Selecting the
various Driver Modes enhances the
ride performance for the road
conditions and the selected mode.
Mode Activation
To activate modes, rotate the Drive
Mode knob left or right to the
desired mode.

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-1500-11698638) - 2019 - CRC - 5/14/19
Driving and Operating 251
Vehicles without mode graphics on
the knob will have a menu selection
screen in the instrument cluster to
select the desired mode. When the
Drive Mode knob is rotated, the
mode list will display the next
available mode.If equipped, select Terrain Mode by
pressing the Terrain Mode button,
below the 4
mtransfer case button.
Modes:
Tour Mode
Use for normal city and highway
driving to provide a smooth, soft
ride. When selected, there is no
indicator in the instrument cluster.
Sport Mode
Use where road conditions or
personal preference demand a more
controlled response.When in Sport Mode, the vehicle will
shift automatically but may hold a
lower gear longer than it would in
the normal driving mode based on
braking, throttle input, and vehicle
lateral acceleration. See
Automatic
Transmission 0233. The steering
will change to provide more precise
control. The continuous damping will
change to provide better cornering
performance.
When selected, the Sport Mode light
displays in the instrument cluster.
Snow Mode
Use when more traction is needed
during slippery conditions. The
vehicle will upshift normally when
the vehicle is moving. The
acceleration will adjust to help
provide a smoother launch.
Snow Mode is only available on
two-wheel-drive vehicles. When
selected, the Snow Mode light
displays in the instrument cluster.

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/-
Mexico-1500-11698638) - 2019 - CRC - 5/13/19
474 Index
Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . 3
SystemBrake Pad Life . . . . . . . . . . . . . . . . 340
Engine Air Filter Life . . . . . . . . . . 330
Forward CollisionAlert (FCA) . . . . . . . . . . . . . . . . . . 265
Infotainment . . . . . . . . . . . . . 190, 451
Noise Control . . . . . . . . . . . . . . . . . 347
Systems Driver Assistance . . . . . . . . . . . . . 258
T
Tachometer . . . . . . . . . . . . . . . . . . . . . 145
Tailgate . . . . . . . . . . . . . . . . . . . . . . . . . . 48
TaillampsBulb Replacement . . . . . . . . . . . . 352
Task Lighting . . . . . . . . . . . . . . . . . . . 185
Text Telephone (TTY) Users . . . . 441
Theft-Deterrent Systems . . . . . . . . . 56
Immobilizer . . . . . . . . . . . . . . . . . . . . . 56
Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134
Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . 363
All-Season . . . . . . . . . . . . . . . . . . . . 364
All-Terrain . . . . . . . . . . . . . . . . . . . . 365
Buying New Tires . . . . . . . . . . . . . 383
Chains . . . . . . . . . . . . . . . . . . . . . . . . 387
Changing . . . . . . . . . . . . . . . . . . . . . 390
Designations . . . . . . . . . . . . . . . . . 368 Tires (cont'd)
Different Size . . . . . . . . . . . . . . . . . 384
Full-Size Spare . . . . . . . . . . . . . . . 399
If a Tire Goes Flat . . . . . . . . . . . . 388
Inspection . . . . . . . . . . . . . . . . . . . . 380
Low Profile . . . . . . . . . . . . . . . . . . . 365
Pressure . . . . . . . . . . . . . . . . . 372, 373
Pressure Light . . . . . . . . . . . . . . . . 159
Pressure Monitor Operation . . 375
Pressure Monitor System . . . . . 374
Rotation . . . . . . . . . . . . . . . . . . . . . . 381
Sidewall Labeling . . . . . . . . . . . . . 365
Terminology and Definitions . . 369
Uniform Tire Quality
Grading . . . . . . . . . . . . . . . . . . . . . 385
Wheel Alignment and Tire Balance . . . . . . . . . . . . . . . . . . . . . 386
Wheel Replacement . . . . . . . . . . 386
When It Is Time for New
Tires . . . . . . . . . . . . . . . . . . . . . . . . 382
Winter . . . . . . . . . . . . . . . . . . . . . . . . 364
Top Tier Fuel . . . . . . . . . . . . . . . . . . . 276
Tow/Haul Mode . . . . . . . . . . . . . . . . . 238
Tow/Haul Mode Light . . . . . . . . . . . 155
Towing Driving Characteristics . . . . . . . . 281
Equipment . . . . . . . . . . . . . . . . . . . . 290
General Information . . . . . . . . . . 281 Towing (cont'd)
Recreational Vehicle . . . . . . . . . . 404
Trailer . . . . . . . . . . . . . . . . . . . . . . . . 286
Trailer Sway Control (TSC) . . . 299
Vehicle . . . . . . . . . . . . . . . . . . . . . . . 403
Traction Limited-Slip Differential . . . . . . . 255
Off Light . . . . . . . . . . . . . . . . . . . . . . 157
Traction Control/Electronic
Stability Control . . . . . . . . . . . . . . . 247
Trailer Sway Control (TSC) . . . . . . . . . . 299
Towing . . . . . . . . . . . . . . . . . . . . . . . . 286
Trailer Towing
App . . . . . . . . . . . . . . . . . . . . . . . . . . . 301
Trailering App . . . . . . . . . . . . . . . . . . 301
Transfer Case . . . . . . . . . . . . . . . . . . 239
Transmission Automatic . . . . . . . . . . . . . . . . . . . . . 233
Fluid, Automatic . . . . . . . . . . . . . . 330
Transportation Program, Courtesy . . . . . . . . . . . . . . . . . . . . . . 444
Trip Odometer . . . . . . . . . . . . . . . . . . 145
Truck-Camper Loading
Information . . . . . . . . . . . . . . . . . . . . 218
Turn and Lane-Change Signals . . . . . . . . . . . . . . . . . . . . . . . . 184