2018 GMC YUKON warning light

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-11349262) - 2018 - CRC - 11/3/17
Keys, Doors, and Windows 59
.PressZto engage the rear
window lockout feature. The
indicator light is on when
engaged.
. Press
Zagain to disengage.
Window Express Movement
All windows can be opened without
holding the window switch. Press
the switch down fully and quickly
release to express open the
window.
If equipped, pull the window switch
up fully and quickly release to
express close the window. Briefly press or pull the window
switch in the same direction to stop
that window’s express movement.
Window Automatic Reversal
System
The express-close feature will
reverse window movement if it
comes in contact with an object.
Extreme cold or ice could cause the
window to auto-reverse. The
window will operate normally after
the object or condition is removed.
Automatic Reversal System
Override
{Warning
If automatic reversal system
override is active, the window will
not reverse automatically. You or
others could be injured and the
window could be damaged.
Before using automatic reversal
system override, make sure that
all people and obstructions are
clear of the window path.
When the engine is on, override the
automatic reversal system by pulling
and holding the window switch if
conditions prevent it from closing.
Programming the Power
Windows
Programming may be necessary if
the vehicle battery has been
disconnected or discharged. If the
window is unable to express-up,
program each express-close
window:
1. Close all doors.
2. Turn the ignition on or to ACC/ ACCESSORY.
3. Partially open the window to be programmed. Then close it and
continue to pull the switch
briefly after the window has
fully closed.
4. Open the window and continue to press the switch briefly after
the window has fully opened.

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-11349262) - 2018 - CRC - 11/3/17
Seats and Restraints 71
The feature is active only once each
time the vehicle is turned on and off,
and will require reactivation by
opening and closing the second row
doors. There may be an alert even
when there is nothing in the rear
seat; for example, if a child entered
the vehicle through the rear door
and left the vehicle without the
vehicle being shut off.
The feature can be turned on or off.
SeeVehicle Personalization 0162.
Heated Rear Seats (If
Equipped)
{Warning
If you cannot feel temperature
change or pain to the skin, the
seat heater may cause burns.
See the Warning under Heated
and Ventilated Front Seats 069.
The buttons are on the rear of the
center console.
Press
MorLto heat the left
outboard or right outboard seat
cushion.
Press the button once for the
highest setting. With each press of
the button, the heated seat changes
to the next lower setting, and then
the off setting. Indicator lights on the
button show the setting: three for
high, two for medium, and one
for low.
If the heated seats are on high for
an extended time, their level may
automatically be lowered.
Second Row Seats
Reclining Seatbacks
To recline the seatback:
1. Lift the lever on the outboard side of the seat.
2. Move the seatback to the desired position, and then
release the lever to lock the
seatback in place.
3. Push and pull on the seatback to make sure it is locked.

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-11349262) - 2018 - CRC - 11/3/17
86 Seats and Restraints
seat belt system from performing
properly. See your dealer to have it
repaired. Torn or frayed seat belts
may not protect you in a crash.
They can rip apart under impact
forces. If a belt is torn or frayed,
have it replaced immediately.
Make sure the seat belt reminder
light is working. SeeSeat Belt
Reminders 0143.
Keep seat belts clean and dry. See
Seat Belt Care 086.
Seat Belt Care
Keep belts clean and dry.
{Warning
Do not bleach or dye seat belt
webbing. It may severely weaken
the webbing. In a crash, they
might not be able to provide
adequate protection. Clean and
rinse seat belt webbing only with
mild soap and lukewarm water.
Allow the webbing to dry. Seat belts should be properly cared
for and maintained.
Seat belt hardware should be kept
dry and free of dust or debris. As
necessary exterior hard surfaces
and seat belt webbing may be lightly
cleaned with mild soap and water.
Ensure there is not excessive dust
or debris in the mechanism. If dust
or debris exists in the system please
see the dealer. Parts may need to
be replaced to ensure proper
functionality of the system.
Replacing Seat Belt
System Parts after a
Crash
{Warning
A crash can damage the seat belt
system in the vehicle. A damaged
seat belt system may not properly
protect the person using it,
resulting in serious injury or even
death in a crash. To help make
sure the seat belt systems are
(Continued)
Warning (Continued)
working properly after a crash,
have them inspected and any
necessary replacements made as
soon as possible.
After a minor crash, replacement of
seat belts may not be necessary.
But the seat belt assemblies that
were used during any crash may
have been stressed or damaged.
See your dealer to have the seat
belt assemblies inspected or
replaced.
New parts and repairs may be
necessary even if the seat belt
system was not being used at the
time of the crash.
Have the seat belt pretensioners
checked if the vehicle has been in a
crash, or if the airbag readiness light
stays on after you start the vehicle
or while you are driving. See Airbag
Readiness Light 0144.

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-11349262) - 2018 - CRC - 11/3/17
88 Seats and Restraints
{Warning
Because airbags inflate with great
force and faster than the blink of
an eye, anyone who is up
against, or very close to any
airbag when it inflates can be
seriously injured or killed. Do not
sit unnecessarily close to any
airbag, as you would be if sitting
on the edge of the seat or leaning
forward. Seat belts help keep you
in position before and during a
crash. Always wear a seat belt,
even with airbags. The driver
should sit as far back as possible
while still maintaining control of
the vehicle. The seat belts and
the front outboard passenger
airbags are most effective when
you are sitting well back and
upright in the seat with both feet
on the floor.(Continued)
Warning (Continued)
Occupants should not lean on or
sleep against the front center
armrest or console in vehicles
with a front center airbag.
Occupants should not lean on or
sleep against the door or side
windows in seating positions with
seat-mounted side impact airbags
and/or roof-rail airbags.
{Warning
Children who are up against,
or very close to, any airbag when
it inflates can be seriously injured
or killed. Always secure children
properly in the vehicle. To read
how, seeOlder Children 0100 or
Infants and Young Children
0 101.
There is an airbag readiness light
on the instrument cluster, which
shows the airbag symbol.
The system checks the airbag
electrical system for malfunctions.
The light tells you if there is an
electrical problem. See Airbag
Readiness Light 0144.

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-11349262) - 2018 - CRC - 11/3/17
Seats and Restraints 93
fuel system after the airbags inflate.
The feature may also activate,
without airbag inflation, after an
event that exceeds a predetermined
threshold. After turning the ignition
off and then on again, the fuel
system will return to normal
operation; the doors can be locked,
the interior lamps can be turned off,
and the hazard warning flashers can
be turned off using the controls for
those features. If any of these
systems are damaged in the crash
they may not operate as normal.
{Warning
A crash severe enough to inflate
the airbags may have also
damaged important functions in
the vehicle, such as the fuel
system, brake and steering
systems, etc. Even if the vehicle
appears to be drivable after a
moderate crash, there may be
concealed damage that could
make it difficult to safely operate
the vehicle.(Continued)
Warning (Continued)
Use caution if you should attempt
to restart the engine after a crash
has occurred.
In many crashes severe enough to
inflate the airbag, windshields are
broken by vehicle deformation.
Additional windshield breakage may
also occur from the front outboard
passenger airbag.
. Airbags are designed to inflate
only once. After an airbag
inflates, you will need some new
parts for the airbag system.
If you do not get them, the
airbag system will not be there
to help protect you in another
crash. A new system will include
airbag modules and possibly
other parts. The service manual
for the vehicle covers the need
to replace other parts. .
The vehicle has a crash sensing
and diagnostic module which
records information after a
crash. See Vehicle Data
Recording and Privacy 0404
and Event Data Recorders
0 404.
. Let only qualified technicians
work on the airbag systems.
Improper service can mean that
an airbag system will not work
properly. See your dealer for
service.
Passenger Sensing
System
The vehicle has a passenger
sensing system for the front
outboard passenger position. The
passenger airbag status indicator
will light on the overhead console
when the vehicle is started.

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-11349262) - 2018 - CRC - 11/3/17
Seats and Restraints 95
Warning (Continued)
secure child restraints in the rear
seat. Consider using another
vehicle to transport the child
when a rear seat is not available.
The passenger sensing system is
designed to turn off the front
outboard passenger frontal airbag if:
. The front outboard passenger
seat is unoccupied.
. The system determines an infant
is present in a child restraint.
. A front outboard passenger
takes his/her weight off of the
seat for a period of time.
. There is a critical problem with
the airbag system or the
passenger sensing system.
When the passenger sensing
system has turned off the front
outboard passenger frontal airbag,
the off indicator will light and stay lit
as a reminder that the airbag is off.
See Passenger Airbag Status
Indicator 0145. The passenger sensing system is
designed to turn on the front
outboard passenger frontal airbag
anytime the system senses that a
person of adult size is sitting
properly in the front outboard
passenger seat.
When the passenger sensing
system has allowed the airbag to be
enabled, the on indicator will light
and stay lit as a reminder that the
airbag is active.
For some children, including
children in child restraints, and for
very small adults, the passenger
sensing system may or may not turn
off the front outboard passenger
frontal airbag, depending upon the
person's seating posture and body
build. Everyone in the vehicle who
has outgrown child restraints should
wear a seat belt properly
—whether
or not there is an airbag for that
person.
{Warning
If the airbag readiness light ever
comes on and stays on, it means
that something may be wrong
with the airbag system. To help
avoid injury to yourself or others,
have the vehicle serviced right
away. See Airbag Readiness
Light 0144 for more information,
including important safety
information.
If the On Indicator Is Lit for a
Child Restraint
The passenger sensing system is
designed to turn off the front
outboard passenger frontal airbag if
the system determines that an infant
is present in a child restraint. If a
child restraint has been installed
and the on indicator is lit:
1. Turn the vehicle off.
2. Remove the child restraint from the vehicle.

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-11349262) - 2018 - CRC - 11/3/17
Seats and Restraints 99
turning off the passenger airbag(s).
SeePassenger Sensing System
0 93.
If the vehicle has rollover roof-rail
airbags, see Different Size Tires
and Wheels 0341 for additional
important information.
If you have to modify your vehicle
because you have a disability and
you have questions about whether
the modifications will affect the
vehicle's airbag system, or if you
have questions about whether the
airbag system will be affected if the
vehicle is modified for any other
reason, call Customer Assistance.
See Customer Assistance Offices
0 394.
Airbag System Check
The airbag system does not need
regularly scheduled maintenance or
replacement. Make sure the airbag
readiness light is working. See
Airbag Readiness Light 0144.
Caution
If an airbag covering is damaged,
opened, or broken, the airbag
may not work properly. Do not
open or break the airbag
coverings. If there are any
opened or broken airbag
coverings, have the airbag
covering and/or airbag module
replaced. For the location of the
airbags, see Where Are the
Airbags? 089. See your dealer
for service.
Replacing Airbag System
Parts after a Crash
{Warning
A crash can damage the airbag
systems in the vehicle.
A damaged airbag system may
not properly protect you and your
passenger(s) in a crash, resulting
in serious injury or even death. To
(Continued)
Warning (Continued)
help make sure the airbag
systems are working properly
after a crash, have them
inspected and any necessary
replacements made as soon as
possible.
If an airbag inflates, you will need to
replace airbag system parts. See
your dealer for service.
If the airbag readiness light stays on
after the vehicle is started or comes
on when you are driving, the airbag
system may not work properly. Have
the vehicle serviced right away. See
Airbag Readiness Light 0144.

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-11349262) - 2018 - CRC - 11/3/17
Instruments and Controls 125
Instruments and
Controls
Controls
Steering Wheel Adjustment . . . 126
Steering Wheel Controls . . . . . . 126
Heated Steering Wheel (IfEquipped) . . . . . . . . . . . . . . . . . . . 126
Horn . . . . . . . . . . . . . . . . . . . . . . . . . . 126
Windshield Wiper/Washer . . . . 126
Rear Window Wiper/ Washer . . . . . . . . . . . . . . . . . . . . . 128
Compass . . . . . . . . . . . . . . . . . . . . . 129
Clock . . . . . . . . . . . . . . . . . . . . . . . . . 129
Power Outlets . . . . . . . . . . . . . . . . 130
Wireless Charging . . . . . . . . . . . . 132
Warning Lights, Gauges, and
Indicators
Warning Lights, Gauges, and Indicators . . . . . . . . . . . . . . . . . . . 135
Instrument Cluster . . . . . . . . . . . . 136
Speedometer . . . . . . . . . . . . . . . . . 139
Odometer . . . . . . . . . . . . . . . . . . . . . 139
Trip Odometer . . . . . . . . . . . . . . . . 139
Tachometer . . . . . . . . . . . . . . . . . . . 139
Fuel Gauge . . . . . . . . . . . . . . . . . . . 140 Engine Oil Pressure
Gauge . . . . . . . . . . . . . . . . . . . . . . 140
Engine Coolant Temperature Gauge . . . . . . . . . . . . . . . . . . . . . . 141
Transmission Temperature
Gauge . . . . . . . . . . . . . . . . . . . . . . 142
Voltmeter Gauge . . . . . . . . . . . . . 143
Seat Belt Reminders . . . . . . . . . 143
Airbag Readiness Light . . . . . . . 144
Passenger Airbag Status Indicator . . . . . . . . . . . . . . . . . . . . 145
Charging System Light . . . . . . . 145
Malfunction Indicator Lamp (Check Engine Light) . . . . . . . . 146
Brake System Warning Light . . . . . . . . . . . . . . . . . . . . . . . . 148
Antilock Brake System (ABS) Warning Light . . . . . . . . . . . . . . . 148
Four-Wheel-Drive Light . . . . . . . 149
Tow/Haul Mode Light . . . . . . . . . 149
Lane Keep Assist (LKA) Light . . . . . . . . . . . . . . . . . . . . . . . . 149
Vehicle Ahead Indicator . . . . . . 150
Traction Off Light . . . . . . . . . . . . . 150
StabiliTrak OFF Light . . . . . . . . . 150
Traction Control System (TCS)/ StabiliTrak Light . . . . . . . . . . . . . 151
Engine Coolant Temperature Warning Light . . . . . . . . . . . . . . . 151
Tire Pressure Light . . . . . . . . . . . 151 Engine Oil Pressure Light . . . . 152
Low Fuel Warning Light . . . . . . 152
Security Light . . . . . . . . . . . . . . . . . 153
High-Beam On Light . . . . . . . . . . 153
Front Fog Lamp Light . . . . . . . . . 153
Lamps On Reminder . . . . . . . . . 153
Cruise Control Light . . . . . . . . . . 154
Door Ajar Light . . . . . . . . . . . . . . . 154
Information Displays
Driver Information
Center (DIC) . . . . . . . . . . . . . . . . 154
Head-Up Display (HUD) . . . . . . 157
Vehicle Messages
Vehicle Messages . . . . . . . . . . . . 161
Engine Power Messages . . . . . 161
Vehicle Speed Messages . . . . . 162
Vehicle Personalization
Vehicle Personalization . . . . . . . 162
Universal Remote System
Universal Remote System . . . . 170
Universal Remote System Programming . . . . . . . . . . . . . . . 170
Universal Remote System Operation . . . . . . . . . . . . . . . . . . . 173