warning light GMC SIERRA DENALI 2019 Owner's Manual

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-1500-11698638) - 2019 - crc - 5/23/18
Instruments and Controls 151before the system is ready for
inspection. This can happen if
the 12-volt battery has recently
been replaced or run down, or if
the vehicle has been recently
serviced.
See your dealer if the vehicle will
not pass or cannot be made ready
for the test.
Brake System Warning
Light The vehicle brake system consists
of electronically controlled hydraulic
brake circuits. If a fault is detected,
valves are adjusted to allow the
brake pedal to push brake fluid
directly into the hydraulic brake
circuits. When a fault occurs, the
brake system warning light comes
on, and Driver Information Center
(DIC) messages may display.
Vehicle speed may also be limited
and the amount of brake pedal force
applied may need to increase. Have
the vehicle brake system serviced
as soon as possible. Metric English
This light should come on briefly
when the engine is started. If it does
not come on then, have it fixed so it
will be ready to warn if there is a
problem.
The brake system warning light may
also come on when the parking
brake is set, if the vehicle has low
brake fluid, or if the brakes are
severely faded. See Brake Fluid
0 336 . If the brakes are overheated,
DIC messages may display, and the
vehicle speed may be limited. If the
brake fluid is not low, if the brakes
are not overheated, and if the
parking brake is fully released, then
the vehicle has a brake problem.
Have the vehicle brake system
serviced as soon as possible. If the light comes on while driving,
pull off the road and stop carefully.
The pedal might be harder to push,
or the pedal may go closer to the
floor. It could take longer to stop.
If the light is still on, have the
vehicle towed for service. See
Towing the Vehicle 0 398 .
{ WarningThe brake system might not be
working properly if the brake
system warning light is on.
Driving with the brake system
warning light on can lead to a
crash. If the light is still on after
the vehicle has been pulled off
the road and carefully stopped,
have the vehicle towed for
service.

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-1500-11698638) - 2019 - crc - 5/15/18
152 Instruments and Controls
Electric Parking Brake
Light Metric English
This light comes on when the
parking brake is applied. If the light
continues flashing after the parking
brake is released, or while driving,
there is a problem with the Electric
Parking Brake system. A message
may also display in the Driver
Information Center (DIC).
If the light does not come on,
or remains flashing, see your dealer. Service Electric Parking
Brake Light
This light should come on briefly
when starting the vehicle. If it does
not come on, have it fixed so it will
be ready to warn if there is a
problem.
If this light stays on, take the vehicle
to your dealer as soon as possible.
See the information for the Electric
Parking Brake under Electric
Parking Brake 0 241 . A message
may also display in the Driver
Information Center (DIC). Antilock Brake System
(ABS) Warning Light
This light comes on briefly when the
engine is started.
If the light does not come on, have it
fixed so it will be ready to warn if
there is a problem.
If the light comes on while driving,
stop as soon as it is safely possible
and turn off the vehicle. Then start
the engine again to reset the
system. If the ABS light stays on,
or comes on again while driving, the
vehicle needs service. A chime may
also sound when the light comes on
steady.
If the ABS light is the only light on,
the vehicle has regular brakes, but
the antilock brakes are not
functioning.

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-1500-11698638) - 2019 - crc - 5/15/18
Instruments and Controls 153If both the ABS and the brake
system warning light are on, the
vehicle's antilock brakes are not
functioning and there is a problem
with the regular brakes. See your
dealer for service.
See Brake System Warning Light
0 151 .
Four-Wheel-Drive Light
Auto Mode Shown, Other Modes
Similar
If equipped, the four-wheel-drive
light displays what mode the vehicle
is in. The light will show each mode:
2WD, 4HI, AUTO (all transfer
cases); 4LOW and N (two-speed
transfer case only).
The light will flash when a shift is in
progress. Once the shift is complete
the light will be steady. If the light turns amber, there may
be a malfunction with the
four-wheel-drive system. See your
dealer.
See Four-Wheel Drive 0 235 .
Tow/Haul Mode Light
For vehicles with the Tow/Haul
Mode feature, this light comes on
when the Tow/Haul Mode has been
activated.
See Tow/Haul Mode 0 234 .
Hill Descent Control Light If equipped, the Hill Descent Control
light comes on when the system is
ready for use. When the light
flashes, the system is active.
See Hill Descent Control (HDC)
0 245 .
Lane Keep Assist (LKA)
Light
If available, this light comes on
briefly while starting the vehicle.
If it does not come on, have the
vehicle serviced.
This light is green if LKA is available
to assist.
LKA may assist by gently turning
the steering wheel if the vehicle
approaches a detected lane marking

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-1500-11698638) - 2019 - crc - 5/15/18
154 Instruments and Controls without using the turn signal in that
direction. The LKA light will turn
amber.
This light is amber and flashes as a
Lane Departure Warning (LDW)
alert, to indicate that the lane
marking has been crossed.
See Lane Keep Assist (LKA) 0 269 .
Vehicle Ahead Indicator
If equipped, this indicator will
display green when a vehicle is
detected ahead and amber when
you are following a vehicle ahead
much too closely.
See Forward Collision Alert (FCA)
System 0 260 . Pedestrian Ahead
Indicator
If equipped, this indicator will
display amber when a nearby
pedestrian is detected directly in
front of the vehicle.
See Front Pedestrian Braking (FPB)
System 0 264 .
Traction Off Light
This light comes on briefly while
starting the engine. If it does not,
have the vehicle serviced by your dealer. If the system is working
normally, the indicator light then
turns off.
The traction off light comes on when
the Traction Control System (TCS)
has been turned off by pressing and
releasing the TCS/ESC button.
This light and the Electronic Stability
Control (ESC) OFF light come on
when ESC is turned off.
If the TCS is off, wheel spin is not
limited. Adjust driving accordingly.
See Traction Control/Electronic
Stability Control 0 243 .
Traction Control System
(TCS)/Electronic Stability
Control Light

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-1500-11698638) - 2019 - crc - 5/15/18
Instruments and Controls 155If equipped, the Electronic Stability
Control (ESC) or TCS indicator/
warning light comes on briefly when
the engine is started.
If the light does not come on, have
the vehicle serviced by your dealer.
If the system is working normally,
the indicator light turns off.
If the light is on and not flashing, the
TCS, and potentially the ESC
system have been disabled.
If the indicator/warning light is on
and flashing, the TCS and/or the
ESC system is actively working.
See Traction Control/Electronic
Stability Control 0 243 .
Trailer Sway Control Light
(Uplevel Cluster) This light will flash when Trailer
Sway Control is active. See Trailer
Sway Control (TSC) 0 293 .
Electronic Stability
Control (ESC) Off Light
This light comes on briefly while
starting the engine. If it does not,
have the vehicle serviced by your
dealer.
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.
See Traction Control/Electronic
Stability Control 0 243 .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 0 331 .

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-1500-11698638) - 2019 - crc - 5/15/18
156 Instruments and Controls 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 0 331 .
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.
This light comes on when Off-Road
Mode is selected.
Tire Pressure Light For vehicles with the Tire Pressure
Monitor System (TPMS), this light
comes on briefly when the engine is
started. It provides information
about tire pressures and the TPMS.
When the Light Is On Steady
This indicates that one or more of
the tires are significantly
underinflated.
A Driver Information Center (DIC)
tire pressure message may also
display. Stop as soon as possible,
and inflate the tires to the pressure
value shown on the Tire and
Loading Information label. See Tire
Pressure 0 367 .
When the Light Flashes First and
Then Is On Steady
If the light flashes for about a minute
and then stays on, there may be a
problem with the TPMS. If the
problem is not corrected, the light
will come on at every ignition cycle.
See Tire Pressure Monitor
Operation 0 370 .

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-1500-11698638) - 2019 - crc - 5/15/18
Instruments and Controls 157
Engine Oil Pressure Light
(Uplevel Cluster) CautionLack of proper engine oil
maintenance can damage the
engine. Driving with the engine oil
low can also damage the engine.
The repairs would not be covered
by the vehicle warranty. Check
the oil level as soon as possible.
Add oil if required, but if the oil
level is within the operating range
and the oil pressure is still low,
have the vehicle serviced. Always
follow the maintenance schedule
for changing engine oil. This light should come on briefly as
the engine is started. If it does not
come on, have the vehicle serviced
by your dealer.
If the light comes on and stays on, it
means that oil is not flowing through
the engine properly. The vehicle
could be low on oil and might have
some other system problem. See
your dealer.
Low Fuel Warning Light
This light is near the fuel gauge and
comes on briefly when the ignition is
turned on as a check to show it is
working.
It also comes on when the fuel tank
is low on fuel. The light turns off
when fuel is added. If it does not,
have the vehicle serviced. Security Light The security light should come on
briefly as the engine is started. If it
does not come on, have the vehicle
serviced by your dealer. If the
system is working normally, the
indicator light turns off.
If the light stays on and the engine
does not start, there could be a
problem with the theft-deterrent
system. See Immobilizer Operation
0 55 .
High-Beam On Light

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-1500-11698638) - 2019 - crc - 5/15/18
Instruments and Controls 165thumbwheel to confirm and save the
setting. This feature may only be
available in P (Park).
Speed Limit Style Adjustment
The speed limit style can be
changed to a speed limit bar or
speed limit sign from the Options
menu. Press the thumbwheel while
Speed Limit Style is highlighted to
change the speed sign style or to
turn it off.
HUD Views
There are four views in the HUD.
Some vehicle information and
vehicle messages or alerts may be
displayed in any view. English Shown, Metric Similar
Speed View : This displays the
speedometer reading in English or
metric units, and speed limit. Some
information only appears on
vehicles that have these features,
and when they are active.
English Shown, Metric Similar
Active Safety View : This displays
the speed view along with a driver
assistance graphic on the left. Driver assistance graphics show
your vehicle, vehicle ahead, gap
setting, and lane status information.
In addition to driver assistance
graphics, pedestrian advisory and
trailer sway indicators will be
displayed.
English Shown, Metric Similar
Navigation/Active OnStar View :
This displays the speed view along
with indicators for vehicle ahead,
Lane Departure Warning/Lane Keep
Assist, trailer sway, and pedestrian
advisory. Turn-by-Turn navigation
information is shown during active
route. The compass heading is
displayed when navigation routing is
not active.

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-1500-11698638) - 2019 - crc - 5/15/18
176 Lighting
Lighting Exterior Lighting Exterior Lamp Controls . . . . . . . 176
Exterior Lamps Off
Reminder . . . . . . . . . . . . . . . . . . . 178
Headlamp High/Low-Beam
Changer . . . . . . . . . . . . . . . . . . . . 178
Flash-to-Pass . . . . . . . . . . . . . . . . 179
Daytime Running
Lamps (DRL) . . . . . . . . . . . . . . . 179
Automatic Headlamp
System . . . . . . . . . . . . . . . . . . . . . . 179
Hazard Warning Flashers . . . . . 180
Turn and Lane-Change
Signals . . . . . . . . . . . . . . . . . . . . . . 181
Fog Lamps . . . . . . . . . . . . . . . . . . . 181
Task Lighting . . . . . . . . . . . . . . . . . 182
Exterior Cargo Lamps . . . . . . . . 182
Interior Lighting Instrument Panel Illumination
Control . . . . . . . . . . . . . . . . . . . . . . 183
Dome Lamps . . . . . . . . . . . . . . . . . 183
Reading Lamps . . . . . . . . . . . . . . 184
Lighting Features
Entry Lighting . . . . . . . . . . . . . . . . 184
Exit Lighting . . . . . . . . . . . . . . . . . . 184 Battery Load Management . . . 185
Battery Power Protection . . . . . 185
Exterior Lighting Battery
Saver . . . . . . . . . . . . . . . . . . . . . . . 185
Exterior Lighting Exterior Lamp Controls
The exterior lamp control is on the
instrument panel to the left of the
steering wheel.
O : Turns off the automatic
headlamps and Daytime Running
Lamps (DRL). Turn the headlamp
control to
O again to turn the
automatic headlamps or DRL
back on.

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-1500-11698638) - 2019 - crc - 5/15/18
180 Lighting
There is a light sensor on top of the
instrument panel. Do not cover the
sensor, otherwise the headlamps
will come on when they are not
needed.
The system may also turn on the
headlamps when driving through a
parking garage or tunnel.
If the vehicle is started in a dark
garage, the automatic headlamp
system comes on immediately. If it
is light outside when the vehicle
leaves the garage, there is a slight
delay before the automatic
headlamp system changes to the
Daytime Running Lamps (DRL).
During that delay, the instrument cluster may not be as bright as
usual. Make sure the instrument
panel illumination control is in the
full bright position. See Instrument
Panel Illumination Control 0 183 .
When it is bright enough outside,
the headlamps will turn off or may
change to DRL.
The automatic headlamp system
turns off when the exterior lamp
control is turned to
O or the ignition
is off.
Lights On with Wipers If the windshield wipers are
activated in daylight with the engine
on, and the exterior lamp control is
in AUTO, the headlamps, parking
lamps, and other exterior lamps
come on. The transition time for the
lamps coming on varies based on
wiper speed. When the wipers are
not operating, these lamps turn off.
Move the exterior lamp control to
Oor
; to disable this feature. Hazard Warning Flashers
| : Press this button to make the
front and rear turn signal lamps
flash on and off. Press again to turn
the flashers off.
When the hazard warning flashers
are on, the vehicle's turn signals will
not work.