2009 GMC YUKON ECU

Head Restraints...............................................1-2
Front Seats......................................................1-4
Manual Seats................................................1-4
Power Seats..................................................1-5
Manual Lumbar..............................................1-6
Power Lumbar ...............................................1-6
Heated Seats.................................................1-7
Heated and Cooled Seats................................1-8
Memory Seat, Mirrors, and Pedals....................1-8
Reclining Seatbacks......................................1-10
Center Seat.................................................1-13
Rear Seats.....................................................1-13
Heated Seats...............................................1-13
60/40 Split Bench Seat (Second Row)................1-14
Bucket Seats (Second Row)...........................1-20
Third Row Seat............................................1-27
Safety Belts...................................................1-32
Safety Belts: They Are for Everyone................1-32
How to Wear Safety Belts Properly.................1-37
Lap-Shoulder Belt.........................................1-45
Safety Belt Use During Pregnancy..................1-52
Lap Belt......................................................1-52
Safety Belt Extender.....................................1-53
Child Restraints.............................................1-54
Older Children..............................................1-54
Infants and Young Children............................1-57Child Restraint Systems.................................1-61
Where to Put the Restraint.............................1-64
Lower Anchors and Tethers for
Children (LATCH)......................................1-66
Securing a Child Restraint in a
Rear Seat Position....................................1-73
Securing a Child Restraint in the
Center Front Seat Position..........................1-77
Securing a Child Restraint in the
Right Front Seat Position............................1-78
Airbag System..............................................
.1-81
Where Are the Airbags?................................1-83
When Should an Airbag Inate?.....................1-86
What Makes an Airbag Inate?.......................1-88
How Does an Airbag Restrain?.......................1-88
What Will You See After an Airbag Inates?.....1-88
Passenger Sensing System............................1-90
Servicing Your Airbag-Equipped Vehicle...........1-96
Adding Equipment to Your Airbag-Equipped
Vehicle....................................................1-96
Restraint System Check..................................1-98
Checking the Restraint Systems......................1-98
Replacing Restraint System Parts
After a Crash............................................1-99
Section 1 Seats and Restraint System
1-1

4. Push and pull on the seat to make sure it is locked
into place. The seatback cannot be raised to the
upright position unless the seat is secured to
the oor.
5. Pull up on the seatback until it locks into the upright
position.
{CAUTION:
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.
6. Push and pull on the seatback to make sure it is
locked.
{CAUTION:
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.
7. Make sure the safety belts are returned to the
original position over the seatbacks.
1-31

Engaging the child restraint locking feature in the
right front seating position may affect the passenger
sensing system. SeePassenger Sensing System
on page 1-90for more information.
If the belt stops before it reaches the buckle, for
lap-shoulder belts with cinching latch plates, tilt the
latch plate and keep pulling the safety belt until
it can be buckled.3. Push the latch plate into the buckle until it clicks.
If you nd 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, seeSafety
Belt Extender on page 1-53.
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 Adjustment” later in this
section for instructions on use and important safety
information.
1-46

To make the belt shorter, pull its free end as shown
until the belt is snug.
If the belt is not long enough, seeSafety Belt Extender
on page 1-53.
Make sure the release button on the buckle is positioned
so you would be able to unbuckle the safety belt
quickly if necessary.
If you nd that the latch plate will not go fully into the
buckle, see if you are using the correct buckle. Be sure
that the latch plate clicks when inserted into the buckle.
Safety Belt Extender
If the safety belt will fasten around you, you should
use it.
But if a safety belt is not long enough, your
dealer/retailer 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 t. The
extender has been designed for adults. Never use it for
securing child seats. To wear it, attach it to the
regular safety belt. For more information, see the
instruction sheet that comes with the extender.
1-53

{CAUTION:
Never do this.
Never hold an infant or a child while riding in a
vehicle. Due to crash forces, an infant or a child
will become so heavy it is not possible to hold it
during a crash. For example, in a crash at only
25 mph (40 km/h), a 12 lb (5.5 kg) infant will
suddenly become a 240 lb (110 kg) force on a
person’s arms. An infant should be secured in an
appropriate restraint.
1-58

{CAUTION:
Never do this.
Children who are up against, or very close to, any
airbag when it inates can be seriously injured or
killed. Never put a rear-facing child restraint in the
right front seat. Secure a rear-facing child restraint
in a rear seat. It is also better to secure a
forward-facing child restraint in a rear seat. If you
must secure a forward-facing child restraint in the
right front seat, always move the front passenger
seat as far back as it will go.
1-59

Q:What are the different types of add-on child
restraints?
A:Add-on child restraints, which are purchased by the
vehicle’s owner, are available in four basic types.
Selection of a particular restraint should take
into consideration not only the child’s weight, height,
and age but also whether or not the restraint will
be compatible with the motor vehicle in which it will
be used.
For most basic types of child restraints, there are
many different models available. When purchasing a
child restraint, be sure it is designed to be used
in a motor vehicle. If it is, the restraint will have a
label saying that it meets federal motor vehicle
safety standards.
The restraint manufacturer’s instructions that come
with the restraint state the weight and height
limitations for a particular child restraint. In addition,
there are many kinds of restraints available for
children with special needs.
{CAUTION:
To reduce the risk of neck and head injury during
a crash, infants need complete support. This is
because an infant’s neck is not fully developed
and its head weighs so much compared with the
rest of its body. In a crash, an infant in a
rear-facing child restraint settles into the restraint,
so the crash forces can be distributed across the
strongest part of an infant’s body, the back and
shoulders. Infants should always be secured in
rear-facing child restraints.
1-60

{CAUTION:
A young child’s hip bones are still so small that
the vehicle’s regular safety belt may not remain
low on the hip bones, as it should. Instead, it may
settle up around the child’s abdomen. In a crash,
the belt would apply force on a body area that is
unprotected by any bony structure. This alone
could cause serious or fatal injuries. To reduce the
risk of serious or fatal injuries during a crash,
young children should always be secured in
appropriate child restraints.
Child Restraint Systems
A rear-facing infant
seat (A) provides restraint
with the seating surface
against the back of
the infant.
The harness system holds the infant in place and, in a
crash, acts to keep the infant positioned in the restraint.
A forward-facing child
seat (B) provides restraint
for the child’s body
with the harness.
1-61