ECU GMC YUKON XL 2016 Owner's Manual

GMC Yukon/Yukon XL Owner Manual (GMNA-Localizing-U.S/Canada-
9159297) - 2016 - CRC - 10/12/15
24 In Brief
Vehicles with Bench Seats
.One on the center stack below
the climate control system.
. One in the storage area on the
bench seat.
. One on the rear of the center
armrest storage.
. One in the third row seat area on
the driver side.
. One in the rear cargo area on
the passenger side.
Lift the cover to access and replace
when not in use.
See Power Outlets 0129.Universal Remote System
If equipped with the Universal
Remote system, these buttons will
be in the front overhead console.
This system provides a way to
replace up to three remote control
transmitters used to activate
devices such as garage door
openers, security systems, and
home automation devices.
See Universal Remote
System 0171.
Sunroof
1. Open or Close
2. Vent
On vehicles with a sunroof, the
sunroof only operates when the
ignition is in ACC/ACCESSORY or
ON/RUN, or when Retained
Accessory Power (RAP) is active.
See Retained Accessory Power
(RAP) 0216.
Vent : From the closed position,
press the rear of switch (2) to vent
the sunroof.

GMC Yukon/Yukon XL Owner Manual (GMNA-Localizing-U.S/Canada-
9159297) - 2016 - CRC - 10/12/15
28 Keys, Doors, and Windows
Keys, Doors, and
Windows
Keys and Locks
Keys (Key Access) . . . . . . . . . . . . 28
Keys (Keyless Access) . . . . . . . . 31
Remote Keyless Entry (RKE)System . . . . . . . . . . . . . . . . . . . . . . . 32
Remote Keyless Entry (RKE) System Operation (Key
Access) . . . . . . . . . . . . . . . . . . . . . . 32
Remote Keyless Entry (RKE) System Operation (Keyless
Access) . . . . . . . . . . . . . . . . . . . . . . 34
Remote Vehicle Start . . . . . . . . . . 40
Door Locks . . . . . . . . . . . . . . . . . . . . 41
Power Door Locks . . . . . . . . . . . . . 42
Delayed Locking . . . . . . . . . . . . . . . 43
Automatic Door Locks . . . . . . . . . 43
Lockout Protection . . . . . . . . . . . . . 43
Safety Locks . . . . . . . . . . . . . . . . . . . 43
Doors
Liftgate . . . . . . . . . . . . . . . . . . . . . . . . 44
Power Assist Steps . . . . . . . . . . . . 48
Vehicle Security
Vehicle Security . . . . . . . . . . . . . . . . 49
Vehicle Alarm System . . . . . . . . . 49 Immobilizer . . . . . . . . . . . . . . . . . . . . 51
Immobilizer Operation (Key
Access) . . . . . . . . . . . . . . . . . . . . . . 51
Immobilizer Operation (Keyless Access) . . . . . . . . . . . . . . . . . . . . . . 52
Exterior Mirrors
Convex Mirrors . . . . . . . . . . . . . . . . 53
Power Mirrors . . . . . . . . . . . . . . . . . . 53
Folding Mirrors . . . . . . . . . . . . . . . . . 54
Heated Mirrors . . . . . . . . . . . . . . . . . 54
Automatic Dimming Mirror . . . . . 54
Blind Spot Mirrors . . . . . . . . . . . . . . 54
Reverse Tilt Mirrors . . . . . . . . . . . . 55
Interior Mirrors
Interior Rearview Mirrors . . . . . . . 56
Manual Rearview Mirror . . . . . . . . 56
Automatic Dimming Rearview
Mirror . . . . . . . . . . . . . . . . . . . . . . . . . 56
Child-View Mirror . . . . . . . . . . . . . . 56
Windows
Windows . . . . . . . . . . . . . . . . . . . . . . . 56
Power Windows . . . . . . . . . . . . . . . 57
Sun Visors . . . . . . . . . . . . . . . . . . . . . 59
Roof
Sunroof . . . . . . . . . . . . . . . . . . . . . . . . 59
Keys and Locks
Keys (Key Access)
{Warning
Leaving children in a vehicle with
an ignition key or Remote
Keyless Entry (RKE) transmitter is
dangerous and children or others
could be seriously injured or
killed. They could operate the
power window or other controls or
make the vehicle move. The
windows will function with the key
in the ignition or with the RKE
transmitter in the vehicle, and
children or others could be caught
in the path of a closing window.
Do not leave children in a vehicle
with the ignition key or an RKE
transmitter.

GMC Yukon/Yukon XL Owner Manual (GMNA-Localizing-U.S/Canada-
9159297) - 2016 - CRC - 10/12/15
30 Keys, Doors, and Windows
Interference from radio-frequency
identification (RFID) tags may
prevent the key from starting the
vehicle. Keep RFID tags away from
the key when starting the vehicle.
The key is used for the driver door,
ignition, and glove box.
Programming Keys
Follow these procedures to program
up to eight keys to the vehicle.
Programming with a Recognized
Key (Key Vehicles Only)
To program a new key:1. Insert the original, already
programmed key in the ignition
and turn the key to the ON/
RUN position.
2. Turn the key to LOCK/OFF, and remove the key.
3. Insert the new key to be programmed and turn it to the
ON/RUN position within
five seconds.
The security light will turn off
once the key has been
programmed.
4. Repeat Steps 1–3 if additional keys are to be programmed.
If a key is lost or damaged, see your
dealer to have a new key made.
Programming without a
Recognized Key (Key
Vehicles Only)
Program a new key to the vehicle
when a recognized key is not
available. Canadian regulations
require that Canadian owners see
their dealer. If there are no currently recognized
keys available, follow this procedure
to program the first key.
This procedure will take
approximately 30 minutes to
complete for the first key. The
vehicle must be off and all of the
keys must be with you.
1. Insert the new vehicle key into the ignition.
2. Turn to ON/RUN. The security light will come on.
3. Wait 10 minutes until the security light turns off.
4. Turn the ignition to LOCK/OFF.
5. Repeat Steps 2–4 two more times. After the third time, turn
to ON/RUN; the key is learned
and all previously known keys
will no longer work with the
vehicle.
Remaining keys can be learned by
following the procedure in
“Programming with a Recognized
Key (Key Vehicles Only).”

GMC Yukon/Yukon XL Owner Manual (GMNA-Localizing-U.S/Canada-
9159297) - 2016 - CRC - 10/12/15
Keys, Doors, and Windows 49
To extend both power assist steps
for cleaning, press
jwhile the
vehicle is in P (Park) or N (Neutral).
Press
jagain to retract them.
The DIC will display a message.
Enable/Disable
Press and hold
jfor four seconds
to lock and disable the power assist
steps. Press and hold
jfor
four seconds again to enable them.
The DIC will display a message.
Vehicle Security
This vehicle has theft-deterrent
features; however, they do not make
the vehicle impossible to steal.
Vehicle Alarm System
The indicator light, on the
instrument panel near the
windshield, indicates the status of
the system.
Off : Alarm system is disarmed.
On Solid : Vehicle is secured
during the delay to arm the system.
Fast Flash : Vehicle is unsecured.
A door, liftgate, or the hood is open.
Slow Flash : Alarm system is
armed.
Arming the Alarm System
1. Turn off the vehicle.
2. Lock the vehicle in one of three ways:
.Use the RKE transmitter.
. Use the Keyless Access
system.
. With a door open, press
Q
on the interior of the door.
3. After 30 seconds the alarm system will arm, and the
indicator light will begin to
slowly flash. Pressing
Qon the
RKE transmitter a second time
will bypass the 30-second
delay and immediately arm the
alarm system.
The vehicle alarm system will not
arm if the doors are locked with
the key.
If the driver door is opened without
first unlocking with the RKE
transmitter, the horn will chirp and
the lights will flash to indicate
pre-alarm. If the vehicle is not
started, or the door is not unlocked

GMC Yukon/Yukon XL Owner Manual (GMNA-Localizing-U.S/Canada-
9159297) - 2016 - CRC - 10/12/15
50 Keys, Doors, and Windows
by pressingKon the RKE
transmitter during the 10-second
pre-alarm, the alarm will be
activated.
The alarm will also be activated if a
passenger door, the liftgate, or the
hood is opened without first
disarming the system. When the
alarm is activated, the turn signals
flash and the horn sounds for about
30 seconds. The alarm system will
then re-arm to monitor for the next
unauthorized event.
Disarming the Alarm System
To disarm the alarm system or turn
off the alarm if it has been activated:
. Press
Kon the RKE transmitter.
. Unlock the vehicle using the
Keyless Access system.
. Start the vehicle.
To avoid setting off the alarm by
accident:
. Lock the vehicle after all
occupants have exited. .
Always unlock a door with the
RKE transmitter, or use the
Keyless Access system.
Unlocking the driver door with
the key will not disarm the
system or turn off the alarm.
How to Detect a Tamper
Condition
IfKis pressed on the RKE
transmitter and the horn chirps three
times, an alarm occurred previously
while the alarm system was armed.
If the alarm has been activated, a
message will appear on the DIC.
See Security Messages 0160.
Power Sounder, Inclination
Sensor, and Intrusion Sensor
In addition to the standard
theft-deterrent system features, this
system may also have a power
sounder, inclination sensor, and
intrusion sensor.
The power sounder provides an
audible alarm which is distinct from
the vehicle’ s horn. It has its own power source, and can sound an
alarm if the vehicle’s battery is
compromised.
The inclination sensor can set off
the alarm if it senses movement of
the vehicle, such as a change in
vehicle orientation.
The intrusion sensor monitors the
vehicle interior, and can activate the
alarm if it senses unauthorized entry
into the vehicle’s interior. Do not
allow passengers or pets to remain
in the vehicle when the intrusion
sensor is activated.
Before arming the theft-deterrent
system and activating the intrusion
sensor:
.
Make sure all doors and
windows are completely closed.
. Secure any loose items such as
a sunshades.
. Make sure there are no
obstructions blocking the
sensors in the front overhead
console.
. Close DVD screens before
leaving the vehicle.

GMC Yukon/Yukon XL Owner Manual (GMNA-Localizing-U.S/Canada-
9159297) - 2016 - CRC - 10/12/15
Keys, Doors, and Windows 51
Intrusion and Inclination
Sensors Disable Switch
It is recommended that the intrusion
and inclination sensors be
deactivated if pets are left in the
vehicle or the vehicle is being
transported.
With the vehicle off, press
oin
the front overhead console to turn
off the feature.
The indicator light will come on
momentarily, indicating that these
sensors have been disabled until
the next time the alarm system is
armed.
Immobilizer
See Radio Frequency
Statement 0390.
Immobilizer Operation
(Key Access)
This vehicle has a passive
theft-deterrent system.
The system does not have to be
manually armed or disarmed.
The vehicle is automatically
immobilized when the vehicle is
turned off.
The system is automatically
disarmed when the key is turned to
ON/RUN, ACC/ACCESSORY,
or START from the LOCK/OFF
position. The security light, in the instrument
cluster, comes on if there is a
problem with arming or disarming
the theft-deterrent system.
When trying to start the vehicle, the
security light comes on briefly when
the ignition is turned on.
If the engine does not start and the
security light stays on, there is a
problem with the system. Turn the
ignition off and try again.
If the engine still does not start, and
the key appears to be undamaged,
try another ignition key. It may be
necessary to check the fuse. See
Fuses
0304. If the engine still does
not start with the other key, the
vehicle needs service. If the vehicle
does start, the first key may be
faulty. See your dealer.

GMC Yukon/Yukon XL Owner Manual (GMNA-Localizing-U.S/Canada-
9159297) - 2016 - CRC - 10/12/15
52 Keys, Doors, and Windows
It is possible for the immobilizer
system to learn new or replacement
keys. Up to eight keys can be
programmed for the vehicle. To
program additional keys, seeKeys
(Keyless Access) 031 orKeys (Key
Access) 028. To program additional
transmitters, see Remote Keyless
Entry (RKE) System Operation (Key
Access) 032 orRemote Keyless
Entry (RKE) System Operation
(Keyless Access) 034.
Do not leave the key or device that
disarms or deactivates the vehicle
theft system in the vehicle.
See your dealer to get a new key
blank cut exactly as the ignition key
that operates the system.
Immobilizer Operation
(Keyless Access)
This vehicle has a passive
theft-deterrent system.
The system does not have to be
manually armed or disarmed.
The vehicle is automatically
immobilized when the vehicle is
turned off. The immobilization system is
disarmed when the ignition button is
pressed in and a valid transmitter is
found in the vehicle.
The security light in the instrument
cluster comes on if there is a
problem with arming or disarming
the theft-deterrent system.
The system has one or more
transmitters matched to an
immobilizer control unit in the
vehicle. Only a correctly matched
transmitter will start the vehicle.
If the transmitter is ever damaged,
you may not be able to start the
vehicle.
When trying to start the vehicle, the
security light comes on briefly when
the ignition is turned on.
If the engine does not start and the
security light stays on, there is a
problem with the system. Turn the
vehicle off and try again.
If the RKE transmitter appears to be
undamaged, try another transmitter
or place the transmitter in the
transmitter pocket/insert next to the
center console storage area
between the driver and front
passenger seats. See
“Starting the
Vehicle with a Low Transmitter”
under Remote Keyless Entry (RKE)
System Operation (Key Access)
0 32 orRemote Keyless Entry
(RKE) System Operation (Keyless
Access) 034.
If the engine does not start with the
other transmitter or when the
transmitter is in the pocket in the
center console, the vehicle needs
service. See your dealer who can
service the theft-deterrent system
and have a new transmitter
programmed to the vehicle.
Do not leave the transmitter or
device that disarms or deactivates
the theft-deterrent system in the
vehicle.

GMC Yukon/Yukon XL Owner Manual (GMNA-Localizing-U.S/Canada-
9159297) - 2016 - CRC - 10/12/15
56 Keys, Doors, and Windows
Interior Mirrors
Interior Rearview Mirrors
Adjust the rearview mirror for a clear
view of the area behind your
vehicle.
If equipped with OnStar, the vehicle
may have three control buttons at
the bottom of the mirror. See your
dealer for more information about
OnStar and how to subscribe to it.
SeeOnStar Overview 0394.
Do not spray glass cleaner directly
on the mirror. Use a soft towel
dampened with water.
Manual Rearview Mirror
If equipped with a manual rearview
mirror, push the tab forward for
daytime use and pull it for nighttime
use to avoid glare from the
headlamps from behind.
Automatic Dimming
Rearview Mirror
If equipped, automatic dimming
reduces the glare of headlamps
from behind. The dimming feature
comes on when the vehicle is
started.
Child-View Mirror
If equipped, push up on the
sunglasses bin and release. Push
the bin back in halfway to secure
the mirror in position.
Push the mirror back up when not
in use.
Windows
{Warning
Never leave a child, a helpless
adult, or a pet alone in a vehicle,
especially with the windows
closed in warm or hot weather.
They can be overcome by the
extreme heat and suffer
permanent injuries or even death
from heat stroke.
The vehicle aerodynamics are
designed to improve fuel economy
performance. This may result in a

GMC Yukon/Yukon XL Owner Manual (GMNA-Localizing-U.S/Canada-
9159297) - 2016 - CRC - 10/12/15
Seats and Restraints 61
Seats and
Restraints
Head Restraints
Head Restraints . . . . . . . . . . . . . . . 62
Front Seats
Center Seat . . . . . . . . . . . . . . . . . . . . 63
Power Seat Adjustment . . . . . . . . 63
Lumbar Adjustment . . . . . . . . . . . . 64
Reclining Seatbacks . . . . . . . . . . . 64
Memory Seats . . . . . . . . . . . . . . . . . 65
Heated and Cooled FrontSeats . . . . . . . . . . . . . . . . . . . . . . . . . 67
Rear Seats
Heated Rear Seats . . . . . . . . . . . . 68
Second Row Seats . . . . . . . . . . . . 68
Third Row Seats . . . . . . . . . . . . . . . 73
Safety Belts
Safety Belts . . . . . . . . . . . . . . . . . . . . 77
How to Wear Safety BeltsProperly . . . . . . . . . . . . . . . . . . . . . . 78
Lap-Shoulder Belt . . . . . . . . . . . . . 79
Safety Belt Use During Pregnancy . . . . . . . . . . . . . . . . . . . . 83
Lap Belt . . . . . . . . . . . . . . . . . . . . . . . 84
Safety Belt Extender . . . . . . . . . . . 85 Safety System Check . . . . . . . . . . 85
Safety Belt Care . . . . . . . . . . . . . . . 85
Replacing Safety Belt System
Parts after a Crash . . . . . . . . . . . 85
Airbag System
Airbag System . . . . . . . . . . . . . . . . . 86
Where Are the Airbags? . . . . . . . 88
When Should an AirbagInflate? . . . . . . . . . . . . . . . . . . . . . . . 89
What Makes an Airbag Inflate? . . . . . . . . . . . . . . . . . . . . . . . 90
How Does an Airbag Restrain? . . . . . . . . . . . . . . . . . . . . . 90
What Will You See after an Airbag Inflates? . . . . . . . . . . . . . . 91
Passenger Sensing System . . . 92
Servicing the Airbag-Equipped
Vehicle . . . . . . . . . . . . . . . . . . . . . . . 96
Adding Equipment to the Airbag-Equipped Vehicle . . . . . 97
Airbag System Check . . . . . . . . . . 97
Replacing Airbag System Parts after a Crash . . . . . . . . . . . . . . . . . 98
Child Restraints
Older Children . . . . . . . . . . . . . . . . . 98
Infants and Young Children . . . 100
Child Restraint Systems . . . . . . 102
Where to Put the Restraint . . . 104 Lower Anchors and Tethers for
Children (LATCH System) . . . 105
Replacing LATCH System Parts After a Crash . . . . . . . . . . 113
Securing Child Restraints
(Center Front Seat) . . . . . . . . . 113
Securing Child Restraints (Rear Seat) . . . . . . . . . . . . . . . . . 114
Securing Child Restraints (Front Passenger Seat) . . . . . 116

GMC Yukon/Yukon XL Owner Manual (GMNA-Localizing-U.S/Canada-
9159297) - 2016 - CRC - 10/12/15
Seats and Restraints 63
Second Row Seats
The vehicle's second row seats
have head restraints in the outboard
seating positions that cannot be
adjusted.
The second row seat outboard head
restraints are not removable.
Third Row Seats
The third row seat head restraint
can be lowered for better visibility
when the rear seat is unoccupied.
To lower the head restraint, press
the button located on the top of the
seatback and push the head
restraint down.Return the lowered head restraint to
the upright position until it locks into
place. Push and pull on the head
restraint to make sure it is locked.
If you are installing a child restraint
in the third row seat, see
“Securing
a Child Restraint Designed for the
LATCH System” underLower
Anchors and Tethers for Children
(LATCH System) 0105.
Front Seats
Center Seat
If equipped, the center front
seatback doubles as an armrest and
cupholder/storage area for the driver
and passenger when the center
front seat is not used. Do not use it
as a seating position when the
seatback is folded down.
Power Seat Adjustment
{Warning
You can lose control of the
vehicle if you try to adjust a driver
seat while the vehicle is moving.
Adjust the driver seat only when
the vehicle is not moving.