2008 CHEVROLET AVALANCHE ECU

Front Seats......................................................1-2
Manual Seats................................................1-2
Power Seats..................................................1-3
Manual Lumbar..............................................1-4
Power Lumbar ...............................................1-4
Heated Seats.................................................1-5
Memory Seat, Mirrors, and Pedals....................1-6
Reclining Seatbacks........................................1-8
Head Restraints............................................1-11
Center Seat.................................................1-11
Rear Seats.....................................................1-12
Rear Seat Operation.....................................1-12
Safety Belts...................................................1-14
Safety Belts: They Are for Everyone................1-14
How to Wear Safety Belts Properly.................1-19
Lap-Shoulder Belt.........................................1-28
Safety Belt Use During Pregnancy..................1-33
Lap Belt......................................................1-34
Safety Belt Extender.....................................1-35
Child Restraints.............................................1-35
Older Children..............................................1-35
Infants and Young Children............................1-38
Child Restraint Systems.................................1-42Where to Put the Restraint.............................1-44
Lower Anchors and Tethers
for Children (LATCH).................................1-46
Securing a Child Restraint in a
Rear Seat Position....................................1-53
Securing a Child Restraint in the
Center Front Seat Position..........................1-56
Securing a Child Restraint in the
Right Front Seat Position............................1-56
Airbag System...............................................1-60
Where Are the Airbags?................................1-63
When Should an Airbag Inate?.....................1-65
What Makes an Airbag Inate?.......................1-67
How Does an Airbag Restrain?.......................1-67
What Will You See After an Airbag Inates?.....1-68
Passenger Sensing System............................1-69
Servicing Your Airbag-Equipped Vehicle...........1-74
Adding Equipment to Your Airbag-Equipped
Vehicle....................................................1-74
Restraint System Check..................................1-76
Checking the Restraint Systems......................1-76
Replacing Restraint System Parts
After a Crash............................................1-77
Section 1 Seats and Restraint Systems
1-1

Lap-Shoulder Belt
All seating positions in your vehicle have a lap-shoulder
belt except for the center front passenger position (if
equipped), which has a lap belt. SeeLap Belt on
page 1-34for more information.
Here is 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 you ever pull the shoulder portion of a passenger
belt out all the way, you may engage the child
restraint locking feature. If this happens, just let the
belt go back all the way and start again.
Engaging the child restraint locking feature may
affect the passenger sensing system. See
Passenger Sensing System on page 1-69.3. 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 1-35.
Make sure the release button on the buckle is
positioned so you would be able to unbuckle the
safety belt quickly if necessary.
1-28

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.
Child Restraints
Older Children
Older children who have outgrown booster seats should
wear the vehicle’s safety belts.
1-35

{CAUTION:
Children can be seriously injured or strangled if
a shoulder belt is wrapped around their neck
and the safety belt continues to tighten. Never
leave children unattended in a vehicle and never
allow children to play with the safety belts.
Every time infants and young children ride in vehicles,
they should have the protection provided by appropriate
restraints. Children who are not restrained properly
can strike other people, or can be thrown out of
the vehicle. In addition, young children should not use
the vehicle’s adult safety belts alone; they need to use a
child restraint.
{CAUTION:
People should never hold an infant in their arms
while riding in a vehicle. An infant does not
weigh much — until a crash. During a crash an
infant will become so heavy it is not possible to
hold it. 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.
1-39

{CAUTION:
Newborn infants need complete support,
including support for the head and neck. This
is necessary because a newborn infant’s neck
is weak and its head weighs so much
compared with the rest of its body. In a crash,
an infant in a rear-facing seat 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 appropriate infant
restraints.
{CAUTION:
The body structure of a young child is quite
unlike that of an adult or older child, for whom
the safety belts are designed. 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. Young
children should always be secured in
appropriate child restraints.
1-41

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. Make sure the child
restraint is properly installed in the vehicle
using the vehicle’s safety belt or LATCH
system, following the instructions that came
with that restraint, and also 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 1-46for 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 your vehicle — even when no child is in it.
1-43

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. Because there are different
systems, it is important to refer to the
instructions that come with the restraint. Make
sure the child is properly secured, following
the instructions that came with that restraint.
Where to Put the Restraint
Accident statistics show that children are safer if they
are restrained in the rear rather than the front seat.
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.
A label on your sun visor says, “Never put a rear-facing
child seat in the front.” This is because the risk to the
rear-facing child is so great, if the airbag deploys.
1-44

{CAUTION:
A child in a rear-facing child restraint can be
seriously injured or killed if the right front
passenger’s airbag inates. This is because
the back of the rear-facing child restraint
would be very close to the inating airbag.
Even if the passenger sensing system has
turned off the right front passenger’s frontal
airbag, no system is fail-safe. No one can
guarantee that an airbag will not deploy under
some unusual circumstance, even though
it is turned off. Rear-facing child restraints
should be secured in a rear seat, even if the
airbag is off.
If you secure a forward-facing child restraint in
the right front seat, always move the front
passenger seat as far back as it will go. It is
better to secure the child restraint in a rear seat.
SeePassenger Sensing System on page 1-69
for additional information.
{CAUTION:
A child in a child restraint in the center front
seat can be badly injured or killed by the
frontal airbags if they inate. Never secure a
child restraint in the center front seat. It is
always better to secure a child restraint in a
rear seat.
Do not use child restraints in the center front seat
position.
When securing a child restraint in a rear seating
position, study the instructions that came with your child
restraint to make sure it is compatible with this vehicle.
Wherever you install a child restraint, be sure to
secure the child restraint properly.
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 your vehicle — even when no child
is in it.
1-45