2015 GMC YUKON DENALI ECU

Black plate (1,1)GMC 2015i Yukon Denali/Yukon XL Denali Owner Manual (GMNA-
Localizing-U.S./Canada/Mexico-8431504) - 2015 - CRC - 7/30/14
Seats and Restraints 3-1
Seats and
Restraints
Head Restraints
Head Restraints . . . . . . . . . . . . . . . 3-2
Front Seats
Power Seat Adjustment . . . . . . . 3-3
Lumbar Adjustment . . . . . . . . . . . 3-4
Reclining Seatbacks . . . . . . . . . . 3-4
Memory Seats . . . . . . . . . . . . . . . . 3-5
Heated and Cooled FrontSeats . . . . . . . . . . . . . . . . . . . . . . . . 3-7
Rear Seats
Heated Rear Seats . . . . . . . . . . . 3-9
Second Row Seats . . . . . . . . . . . 3-9
Third Row Seats . . . . . . . . . . . . . 3-14
Safety Belts
Safety Belts . . . . . . . . . . . . . . . . . . 3-16
How to Wear Safety BeltsProperly . . . . . . . . . . . . . . . . . . . . 3-18 Lap-Shoulder Belt . . . . . . . . . . . 3-19
Safety Belt Use During
Pregnancy . . . . . . . . . . . . . . . . . . 3-24
Safety Belt Extender . . . . . . . . . 3-24
Safety System Check . . . . . . . . 3-24
Safety Belt Care . . . . . . . . . . . . . 3-25
Replacing Safety Belt System Parts after a Crash . . . . . . . . . 3-25
Airbag System
Airbag System . . . . . . . . . . . . . . . 3-26
Where Are the Airbags? . . . . . 3-28
When Should an AirbagInflate? . . . . . . . . . . . . . . . . . . . . . 3-30
What Makes an Airbag Inflate? . . . . . . . . . . . . . . . . . . . . . 3-31
How Does an Airbag
Restrain? . . . . . . . . . . . . . . . . . . . 3-31
What Will You See after an Airbag Inflates? . . . . . . . . . . . . 3-31
Passenger Sensing System . . . . . . . . . . . . . . . . . . . . . 3-33
Servicing the Airbag-Equipped Vehicle . . . . . . . . . . . . . . . . . . . . . 3-37 Adding Equipment to the
Airbag-Equipped Vehicle . . . 3-37
Airbag System Check . . . . . . . . 3-38
Replacing Airbag System Parts after a Crash . . . . . . . . . 3-39
Child Restraints
Older Children . . . . . . . . . . . . . . . 3-39
Infants and Young
Children . . . . . . . . . . . . . . . . . . . . 3-41
Child Restraint Systems . . . . . 3-44
Where to Put the Restraint . . . 3-46
Lower Anchors and Tethers for Children (LATCH
System) . . . . . . . . . . . . . . . . . . . . 3-47
Replacing LATCH System Parts After a Crash . . . . . . . . . 3-55
Securing Child Restraints (Rear Seat) . . . . . . . . . . . . . . . . . 3-56
Securing Child Restraints (Front Passenger Seat) . . . . 3-58

Black plate (3,1)GMC 2015i Yukon Denali/Yukon XL Denali Owner Manual (GMNA-
Localizing-U.S./Canada/Mexico-8431504) - 2015 - CRC - 7/30/14
Seats and Restraints 3-3
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) on page 3-47.
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.

Black plate (14,1)GMC 2015i Yukon Denali/Yukon XL Denali Owner Manual (GMNA-
Localizing-U.S./Canada/Mexico-8431504) - 2015 - CRC - 7/30/14
3-14 Seats and Restraints
2. Press the button (1) on the sidetrim of the cargo area to fold the
seatback.
The left button folds the left
seatback, and the right button
folds the right seatback.
3. Press the button again to release the rear of the seat from
the floor. The seat will tumble
forward.
The buttons (2) can be used to fold
and unfold the third row seatbacks
from the cargo area. See Third Row
Seats on page 3-14.
Returning the Seat to the
Sitting Position
{Warning
If either seatback is not locked, it
could move forward in a sudden
stop or crash. That could cause
injury to the person sitting there.
Always push and pull on the
seatbacks to be sure they are
locked. To return the seat to the sitting
position from the tumbled position:
1. Pull the seat down until both
sides of the seat are latched to
the floor. Make sure the seat is
securely latched to the floor
before raising the seatback.
If both sides are not latched to
the floor, the seatback will not
raise.
2. Lift the seatback and push it rearward. Push and pull on the
seatback to make sure it is
locked.
Third Row Seats
Folding the Seatback
{Caution
Folding a rear seat with the safety
belts still fastened may cause
damage to the seat or the safety
belts. Always unbuckle the safety
(Continued)
Caution (Continued)
belts and return them to their
normal stowed position before
folding a rear seat.
The transmission must be in
P (Park) for this feature to work.
The third row seatbacks can be
folded to increase cargo space.
1. Second Row Power Seat Buttons

Black plate (16,1)GMC 2015i Yukon Denali/Yukon XL Denali Owner Manual (GMNA-
Localizing-U.S./Canada/Mexico-8431504) - 2015 - CRC - 7/30/14
3-16 Seats and Restraints
To return the seatback to the upright
position:
1. Open the liftgate to access thecontrols for the seat.
2. Press and hold the switch (2) on the side trim of the cargo area to
raise the seatback.
The left switch raises the left
seatback, and the right switch
raises the right seatback.
{Warning
A safety belt that is improperly
routed, not properly attached,
or twisted will not provide the
protection needed in a crash. The
person wearing the belt could be
seriously injured. After raising the
rear seatback, always check to be
sure that the safety belts are
properly routed and attached, and
are not twisted. 3. Reconnect the center safety belt
mini-latch to the mini-buckle. Do
not let it twist.
4. Pull on the safety belt to be sure the mini-latch is secure.
5. Repeat the steps for the other seatback, if desired.
Safety Belts
This section of the manual
describes how to use safety belts
properly. It also describes some
things not to do with safety belts.
{Warning
Do not let anyone ride where a
safety belt cannot be worn
properly. In a crash, if you or your
passenger(s) are not wearing
safety belts, injuries can be much
worse than if you are wearing
safety belts. You can be seriously
injured or killed by hitting things
inside the vehicle harder or by
being ejected from the vehicle. In
addition, anyone who is not
buckled up can strike other
passengers in the vehicle.
It is extremely dangerous to ride
in a cargo area, inside or outside
of a vehicle. In a collision,
passengers riding in these areas
(Continued)

Black plate (20,1)GMC 2015i Yukon Denali/Yukon XL Denali Owner Manual (GMNA-
Localizing-U.S./Canada/Mexico-8431504) - 2015 - CRC - 7/30/14
3-20 Seats and Restraints
For front seating positions, if the
webbing locks in the latch plate
before it reaches the buckle, tilt
the latch plate flat to unlock.
3. Push the latch plate into thebuckle until it clicks. If you find
that the latch plate will not go
fully into the buckle, see if you
are using the correct buckle.
Pull up on the latch plate to
make sure it is secure. If the belt
is not long enough, see Safety
Belt Extender on page 3-24. Position the release button on
the buckle so that the safety belt
could be quickly unbuckled if
necessary.
4. If equipped with a shoulder belt height adjuster, move it to the
height that is right for you. See
“Shoulder Belt Height Adjuster”
in this section for instructions on
use and important safety
information.
5. To make the lap part tight, pullup on the shoulder belt.
For third row seats, it may be
necessary to pull stitching on the
safety belt through the latch
plate to fully tighten the lap belt
on smaller occupants.
To unlatch the belt, push the button
on the buckle. The belt should
return to its stowed position.

Black plate (24,1)GMC 2015i Yukon Denali/Yukon XL Denali Owner Manual (GMNA-
Localizing-U.S./Canada/Mexico-8431504) - 2015 - CRC - 7/30/14
3-24 Seats and Restraints
Safety Belt Use During
Pregnancy
Safety belts work for everyone,
including pregnant women. Like all
occupants, they are more likely to
be seriously injured if they do not
wear safety belts.
A pregnant woman should wear a
lap-shoulder belt, and the lap
portion should be worn as low as
possible, below the rounding,
throughout the pregnancy.The best way to protect the fetus is
to protect the mother. When a safety
belt is worn properly, it is more likely
that the fetus will not be hurt in a
crash. For pregnant women, as for
anyone, the key to making safety
belts effective is wearing them
properly.
Safety Belt Extender
If the vehicle's safety belt will fasten
around you, you should use it.
But if a safety belt is not long
enough, your dealer will order you
an extender. When you go in to
order it, take the heaviest coat you
will wear, so the extender will be
long enough for you. To help avoid
personal injury, do not let someone
else use it, and use it only for the
seat it is made to fit. The extender
has been designed for adults. Never
use it for securing child seats. To
wear it, attach it to the regular safety
belt. See the instruction sheet that
comes with the extender.
Safety System Check
Now and then, check that the safety
belt reminder light, safety belts,
buckles, latch plates, retractors, and
anchorages are all working properly.
Look for any other loose or
damaged safety belt system parts
that might keep a safety belt system
from doing its job. See your dealer
to have it repaired. Torn or frayed
safety belts may not protect you in a
crash. They can rip apart under
impact forces. If a belt is torn or
frayed, get a new one right away.
Make sure the safety belt reminder
light is working. See
Safety Belt
Reminders on page 5-17.
Keep safety belts clean and dry.
See Safety Belt Care on page 3-25.

Black plate (27,1)GMC 2015i Yukon Denali/Yukon XL Denali Owner Manual (GMNA-
Localizing-U.S./Canada/Mexico-8431504) - 2015 - CRC - 7/30/14
Seats and Restraints 3-27
{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. Safety belts help keep
you in position before and during
a crash. Always wear a safety
belt, even with airbags. The driver
should sit as far back as possible
while still maintaining control of
the vehicle.
Occupants should not lean on or
sleep against the front center
armrest or console in vehicles
with a front center airbag.(Continued)
Warning (Continued)
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 on
page 3-39 orInfants and Young
Children on page 3-41.
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 on page 5-18.

Black plate (29,1)GMC 2015i Yukon Denali/Yukon XL Denali Owner Manual (GMNA-
Localizing-U.S./Canada/Mexico-8431504) - 2015 - CRC - 7/30/14
Seats and Restraints 3-29
Driver Side Shown, PassengerSide Similar
The driver and front outboard
passenger seat-mounted side
impact airbags are in the side of the
seatbacks closest to the door.Driver Side Shown, Passenger Side Similar
The roof-rail airbags for the driver,
front outboard passenger, and
second and third row outboard
passengers are in the ceiling above
the side windows.
{Warning
If something is between an
occupant and an airbag, the
airbag might not inflate properly
or it might force the object into (Continued)
Warning (Continued)
that person causing severe injury
or even death. The path of an
inflating airbag must be kept
clear. Do not put anything
between an occupant and an
airbag, and do not attach or put
anything on the steering wheel
hub or on or near any other
airbag covering.
Do not use seat or console
accessories that block the
inflation path of a seat-mounted
side impact airbag or the front
center airbag.
Never secure anything to the roof
of a vehicle with roof-rail airbags
by routing a rope or tie-down
through any door or window
opening. If you do, the path of an
inflating roof-rail airbag will be
blocked.