GMC YUKON XL 2017 Repair Manual

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-9955936) - 2017 - crc - 7/5/16
60 Keys, Doors, and Windows
Roof
Sunroof
1. SLIDE Switch
2. TILT Switch
If equipped, the sunroof only
operates when the ignition is on or
in ACC/ACCESSORY, or when
Retained Accessory Power (RAP) is
active. SeeRetained Accessory
Power (RAP) 0223. Slide Switch
Express-Open/Express-Close :
To
express-open the sunroof, fully
press and release
I(1). To
express-close the sunroof, fully
press and release
K(1). Press
the switch again to stop the
movement.
Open/Close (Manual Mode) : To
open the sunroof, press and hold
I
(1). Release the switch at the
desired position. Press and hold
K(1) to close the sunroof.
Release the switch at the desired
position.
Tilt Switch
Vent : From the closed position,
press
J(2) to vent the sunroof.
Press
K(2) to close the
sunroof vent.
When the sunroof is opened, an air
deflector will automatically raise.
The air deflector will retract when
the sunroof is closed. The sunroof also has a sunshade
which can be pulled forward to block
sun rays. The sunshade must be
opened and closed manually when
the sunroof is in the vent or fully
closed position.
Automatic Reversal System
The sunroof is equipped with an
automatic reversal system that is
only active when the sunroof is
being operated in express-close.
If an object is in the path of the
sunroof while it is express closing,
the reversal system will detect the
object and stop. In the event of
closing difficulties like frost or other
conditions, it is possible to override
the reversal system. To override the
reversal system, close in manual
mode. To stop the movement,
release the switch.

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-9955936) - 2017 - crc - 7/5/16
Keys, Doors, and Windows 61
Dirt and debris may collect on the
sunroof seal or in the track. This
could cause an issue with sunroof
operation or noise. It could also plug
the water drainage system.
Periodically open the sunroof and
remove any obstacles or loose
debris. Wipe the sunroof seal and
roof sealing area using a clean
cloth, mild soap, and water. Do not
remove grease from the sunroof.
If water is seen dripping into the
water drainage system, this is
normal.

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-9955936) - 2017 - crc - 7/5/16
62 Seats and Restraints
Seats and
Restraints
Head Restraints
Head Restraints . . . . . . . . . . . . . . . 63
Front Seats
Power Seat Adjustment . . . . . . . . 64
Lumbar Adjustment . . . . . . . . . . . . 65
Reclining Seatbacks . . . . . . . . . . . 65
Memory Seats . . . . . . . . . . . . . . . . . 66
Heated and Ventilated FrontSeats . . . . . . . . . . . . . . . . . . . . . . . . . 68
Rear Seats
Rear Seats . . . . . . . . . . . . . . . . . . . . 69
Heated Rear Seats . . . . . . . . . . . . 70
Second Row Seats . . . . . . . . . . . . 70
Third Row Seats . . . . . . . . . . . . . . . 75
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 . . . . . . . . . . . 84 Safety System Check . . . . . . . . . . 84
Safety Belt Care . . . . . . . . . . . . . . . 85
Replacing Safety Belt System
Parts after a Crash . . . . . . . . . . . 85
Airbag System
Airbag System . . . . . . . . . . . . . . . . . 86
Where Are the Airbags? . . . . . . . 87
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 (With
the Safety Belt in the
Rear Seat) . . . . . . . . . . . . . . . . . . 113
Securing Child Restraints (With the Safety Belt in the Center
Front Seat) . . . . . . . . . . . . . . . . . . 116
Securing Child Restraints (With the Safety Belt in the Front
Passenger Seat) . . . . . . . . . . . . 116

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-9955936) - 2017 - crc - 7/5/16
Seats and Restraints 63
Head Restraints
Front Seats
The vehicle’s front seats have
adjustable head restraints in the
outboard seating positions.
{Warning
With head restraints that are not
installed and adjusted properly,
there is a greater chance that
occupants will suffer a neck/
spinal injury in a crash. Do not
drive until the head restraints for
all occupants are installed and
adjusted properly.
Adjust the head restraint so that the
top of the restraint is at the same
height as the top of the occupant's
head. This position reduces the
chance of a neck injury in a crash.The height of the head restraint can
be adjusted. Pull the head restraint
up to raise it. Try to move the head
restraint to make sure that it is
locked in place.
To lower the head restraint, press
the button, located on the top of the
seatback, and push the head
restraint down. Try to move the
head restraint after the button is
released to make sure that it is
locked in place.
The front seat outboard head
restraints are not removable.

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-9955936) - 2017 - crc - 7/5/16
64 Seats and Restraints
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 to allow 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
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.

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-9955936) - 2017 - crc - 7/5/16
Seats and Restraints 65
To adjust the seat:
.Move the seat forward or
rearward by sliding the control
forward or rearward.
. Raise or lower the front part of
the seat cushion by moving the
front of the control up or down.
. Raise or lower the seat by
moving the rear of the control up
or down.
To adjust the seatback, see
Reclining Seatbacks 065.
To adjust the lumbar support, see
Lumbar Adjustment 065.
Some vehicles are equipped with a
feature that activates a vibrating
pulse alert in the driver seat to help
the driver avoid crashes. See Driver
Assistance Systems 0251.Lumbar Adjustment
To adjust the lumbar support:
.
Press and hold the control
forward to increase or rearward
to decrease upper and lower
lumbar support at the same time.
. Press and hold the control up to
increase upper lumbar support
and decrease lower lumbar
support.
Press and hold the control down
to increase lower lumbar support
and decrease upper lumbar
support.
Reclining Seatbacks
To recline the seatback:
.Tilt the top of the control
rearward to recline.
. Tilt the top of the control forward
to raise.
{Warning
Sitting in a reclined position when
the vehicle is in motion can be
dangerous. Even when buckled
up, the safety belts cannot do
their job.
(Continued)

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-9955936) - 2017 - crc - 7/5/16
66 Seats and Restraints
Warning (Continued)
The shoulder belt will not be
against your body. Instead, it will
be in front of you. In a crash, you
could go into it, receiving neck or
other injuries.
The lap belt could go up over
your abdomen. The belt forces
would be there, not at your pelvic
bones. This could cause serious
internal injuries.
For proper protection when the
vehicle is in motion, have the
seatback upright. Then sit well
back in the seat and wear the
safety belt properly.
Do not have a seatback reclined if
the vehicle is moving.
Memory Seats
If memory equipped, the SET, 1, 2,
and
B(Exit) buttons on the driver
door are used to manually save and
recall memory settings for the driver
seat, outside mirrors, power tilt and
telescoping steering column, and
adjustable pedals.
Storing Memory Positions
To save positions to the 1 and 2
buttons:
1. The ignition must be in ON/ RUN or ACC/ACCESSORY.
2. Adjust the driver seat, outside mirrors, power tilt and
telescoping steering column,
and adjustable pedals to the
desired driving positions.
3. Press and release SET.
4. Immediately press and hold 1 until two beeps sound.
5. Repeat Steps 1–4 for a second driver using 2.

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-9955936) - 2017 - crc - 7/5/16
Seats and Restraints 67
To store positions to theB(Exit)
button and easy exit features,
repeat above Steps 1–4 to store
your positions for getting out of the
vehicle.
Manually Recalling Memory
Positions
Press and hold 1, 2, or
Bto
manually recall the previously
stored memory positions. Releasing
1, 2, or
Bbefore the stored
positions are reached stops the
recall.
If something has blocked the driver
seat, power tilt and telescoping
steering column, and/or adjustable
pedals while recalling a memory
position, the recall may stop.
Remove the obstruction; then press
and hold the appropriate manual
control for the memory item that is
not recalling for two seconds. Try
recalling the memory position again
by pressing the appropriate memory
button. If the memory position is still
not recalling, see your dealer for
service. Automatically Recalling Memory
Positions (Auto Memory Recall)
If programmed on in the vehicle
personalization Menu, the Auto
(Automatic) Memory Recall feature
automatically recalls the current
driver
’s previously stored 1 or 2
position when the ignition is
changed from off to ON/RUN or
ACC/ACCESSORY.
See “Auto Memory Recall” under
"Comfort and Convenience" in
Vehicle Personalization 0170.
To stop recall movement, press one
of the memory, power mirror,
or power seat controls; press the
power tilt and telescoping steering
column control; or press the
adjustable pedal control.
If something has blocked the driver
seat, power tilt and telescoping
steering column, and/or adjustable
pedals while recalling a memory
position, the recall may stop.
Remove the obstruction. Then do
one of the following: .
If automatically or manually
recalling the stored memory
position, press and hold the
appropriate manual control for
two seconds. Try recalling again
by pressing the appropriate
memory button.
. If recalling the exit position,
press and hold the appropriate
manual control for the exit
feature not recalling for
two seconds. Then try recalling
the exit position again.
RKE transmitters are not labeled
with a number. If your memory seat
position is stored to 1 or 2, but this
position is not automatically
recalling, then store your positions
to the other button or switch RKE
transmitters with the other driver.
If the vehicle driver has changed, in
some vehicles the Driver ID may be
displayed for the first few ignition
cycles.
Easy Exit Recall
If programmed on in the vehicle
personalization menu, the easy exit
feature automatically recalls the

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-9955936) - 2017 - crc - 7/5/16
68 Seats and Restraints
previously storedB(Exit) positions
for getting out of the vehicle. See
Vehicle Personalization 0170.
Easy exit recall automatically
activates when one of the following
occurs:
. The vehicle is turned off and the
driver door is opened within a
short time.
. The vehicle is turned off with the
driver door open.
If something has blocked the driver
seat, power tilt and telescoping
steering column, and/or adjustable
pedals while recalling the exit
position, the recall may stop.
Remove the obstruction; then press
and hold the appropriate manual
control for the exit feature not
recalling for two seconds. Try
recalling the exit position again.
If the exit position is still not
recalling, see your dealer for
service.Heated and Ventilated
Front Seats
{Warning
If you cannot feel temperature
change or pain to the skin, the
seat heater may cause burns. To
reduce the risk of burns, people
with such a condition should use
care when using the seat heater,
especially for long periods of
time. Do not place anything on
the seat that insulates against
heat, such as a blanket, cushion,
cover, or similar item. This may
cause the seat heater to
overheat. An overheated seat
heater may cause a burn or may
damage the seat.
The buttons are on the center stack
below the climate control system. To
operate, the engine must be
running.
Press
Ito heat the driver or
passenger seatback only.
Press
Jto heat the driver or
passenger seat cushion and
seatback.
Press
Cto ventilate the driver or
passenger seat.
The indicator light on the button
comes on when this feature is on.

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-9955936) - 2017 - crc - 7/5/16
Seats and Restraints 69
Press the button once for the
highest setting. With each press of
the button, the seat will change to
the next lower setting, and then to
the off setting. The indicator lights
next to the buttons indicate three for
the highest setting and one for the
lowest. If the heated seats are on
high for an extended time, their level
may automatically be lowered.
The passenger seat may take
longer to heat up.Remote Start Auto Heated and
Ventilated Seats
During a remote start, the heated or
ventilated seats can be turned on
automatically. When it is cold
outside, the heated seats turn on,
and when it is hot outside the
ventilated seats turn on. The heated
or ventilated seats are canceled
when the ignition is turned on. Press
the heated or ventilated seat button
to use the heated or ventilated seats
after the vehicle is started.
The heated or ventilated seat
indicator lights do not turn on during
a remote start.
The temperature performance of an
unoccupied seat may be reduced.
This is normal.
The heated or ventilated seats will
not turn on during a remote start
unless they are enabled in the
vehicle personalization menu. See
Remote Vehicle Start
040 and
Vehicle Personalization 0170.Rear Seats
Rear Seat Reminder
Look in Rear Seat Reminder
Feature
This message displays under
certain conditions indicating there
may be an item or passenger in the
rear seat. Check before exiting the
vehicle.
This feature will activate when a
second row door is opened while
the vehicle is on or up to 10 minutes
before the vehicle is turned on,
including if the vehicle was started
remotely. There will be an alert
when the vehicle is turned off. The
alert does not directly detect objects
in the rear seat; instead, under
certain conditions, it detects when a
rear door is opened and closed,
indicating that there may be
something in the rear seat.
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