2009 GMC ACADIA ECU

Seats and
Restraint System
Head Restraints
Head Restraints..................1-2
Front Seats
Manual Seats.....................1-3
Seat Height Adjuster...........1-3
Power Seats.......................1-4
Manual Lumbar..................1-4
Power Lumbar....................1-5
Heated Seats.....................1-5
Heated and Cooled Seats. . .1-6
Memory Seat and Mirrors. . .1-6
Reclining Seatbacks...........1-8
Rear Seats
Rear Seat Operation.........1-10
Third Row Seats...............1-12
Safety Belts
Safety Belts: They Are
for Everyone...................1-15
How to Wear Safety
Belts Properly..................1-18
Lap-Shoulder Belt.............1-23
Safety Belt Use During
Pregnancy.......................1-28
Safety Belt Extender.........1-28
Child Restraints
Older Children..................1-29
Infants and Young
Children..........................1-31
Child Restraint Systems. . . .1-34
Where to Put the
Restraint.........................1-35
Lower Anchors and
Tethers for Children
(LATCH)
..........................1-37
Securing a Child
Restraint in a Rear
Seat Position
...................1-43
Securing a Child
Restraint in the Right
Front Seat Position
.........1-45
Airbag System
Airbag System..................1-48
Where Are the Airbags?. . . .1-50
When Should an
Airbag Inate?.................1-51
What Makes an
Airbag Inate?.................1-53
How Does an Airbag
Restrain?........................1-53
What Will You See After
an Airbag Inates?..........1-54
Passenger Sensing
System............................1-55
Servicing Your
Airbag-Equipped
Vehicle
............................1-59
Adding Equipment to
Your Airbag-Equipped
Vehicle
............................1-60
Restraint System Check
Checking the Restraint
Systems..........................1-61
Replacing Restraint
System Parts After
a Crash
...........................1-62
Seats and Restraint System 1-1

3. Pull up on the release lever
located on the back of the
seat. The headrest moves
forward automatically.
4. Push the seatback forward to
lay at.To return the seatback to the
seating position:
1. Raise the seatback into place by
using the pullstrap from the rear
of the vehicle, or by pushing
it into place from inside the
vehicle.
2. The headrest must be locked into
place before sitting in the seat.
{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.
3. Push and pull on the seatback to
make sure it is locked in place.
{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.
4. Reconnect the center safety belt
mini-latch to the mini-buckle. Do
not let it twist.
5. Pull on the safety belt to be sure
the mini-latch is secure.
Seats and Restraint System 1-13

Lap-Shoulder Belt
All seating positions in the vehicle
have a lap-shoulder belt.
If you are using a rear seating
position with a detachable safety
belt and the safety belt is not
attached, seeThird Row Seats on
page 1-12for instruction on
reconnecting the safety belt to the
mini-buckle.
The following instructions explain
how to wear a lap-shoulder belt
properly.
1. Adjust the seat, if the seat is
adjustable, so you can sit up
straight. To see how, see “Seats”
in the Index.2. Pick up the latch plate and pull
the belt across you. Do not let
it get twisted.
The lap-shoulder belt may lock if
you pull the belt across you
very quickly. If this happens, let
the belt go back slightly to
unlock it. Then pull the belt
across you more slowly.
If the shoulder portion of a
passenger belt is pulled out all
the way, the child restraint
locking feature may be engaged.
If this happens, let the belt go
back all the way and start again.3. Push the latch plate into the
buckle until it clicks.
4. Pull up on the latch plate to
make sure it is secure. If the belt
is not long enough, seeSafety
Belt Extender on page 1-28.
Position the release button on
the buckle so that the safety belt
could be quickly unbuckled if
necessary.
Seats and Restraint System 1-23

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 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.
1-28 Seats and Restraint System

According to accident statistics,
children and infants are safer when
properly restrained in a child
restraint system or infant restraint
system secured in a rear seating
position.
In a crash, children who are not
buckled up can strike other people
who are buckled up, or can be
thrown out of the vehicle. Older
children need to use safety
belts properly.{CAUTION
Never do this.
Never allow two children to wear
the same safety belt. The safety
belt can not properly spread the
impact forces. In a crash, the two
children can be crushed together
and seriously injured. A safety
belt must be used by only one
person at a time.
{CAUTION
Never do this.
Never allow a child to wear the
safety belt with the shoulder belt
behind their back. A child can be
seriously injured by not wearing
the lap-shoulder belt properly. In a
crash, the child would not be
restrained by the shoulder belt.
The child could move too far
forward increasing the chance of
head and neck injury. The child
might also slide under the lap
belt. The belt force would then be
applied right on the abdomen.
(Continued)
1-30 Seats and Restraint System

{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.
{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.
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.
1-32 Seats and Restraint System

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.
{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.
Seats and Restraint System 1-33

Securing an Add-On Child
Restraint in the Vehicle
{CAUTION
A child can be seriously injured or
killed in a crash if the child restraint
is not properly secured in the
vehicle. Secure the child restraint
properly in the vehicle using the
vehicle’s safety belt or LATCH
system, following the instructions
that came with that child restraint
and the instructions in this manual.
To help reduce the chance of injury,
the child restraint must be secured in
the vehicle. Child restraint systems
must be secured in vehicle seats by
lap belts or the lap belt portion of a
lap-shoulder belt, or by the LATCH
system. SeeLower Anchors and
Tethers for Children (LATCH) on
page 1-37for more information. A
child can be endangered in a crash if
the child restraint is not properly
secured in the vehicle.When securing an add-on child
restraint, refer to the instructions that
come with the restraint which may be
on the restraint itself or in a booklet,
or both, and to this manual. The child
restraint instructions are important,
so if they are not available, obtain a
replacement copy from the
manufacturer.
Keep in mind that an unsecured child
restraint can move around in a
collision or sudden stop and injure
people in the vehicle. Be sure to
properly secure any child restraint
in the vehicle — even when no child
is in it.
Securing the Child Within the
Child Restraint
{CAUTION
A child can be seriously injured or
killed in a crash if the child is not
properly secured in the child
restraint. Secure the child properly
following the instructions that
came with that child restraint.
Where to Put the
Restraint
According to accident statistics,
children and infants are safer when
properly restrained in a child restraint
system or infant restraint system
secured in a rear seating position.
We recommend that children and
child restraints be secured in a rear
seat, including: an infant or a child
riding in a rear-facing child restraint;
a child riding in a forward-facing child
seat; an older child riding in a booster
seat; and children, who are large
enough, using safety belts.
Seats and Restraint System 1-35