2003 CHEVROLET IMPALA ECU

Front Seats......................................................1-2
Manual Seats................................................1-2
Six-Way Power Seats.....................................1-3
Manual Lumbar..............................................1-3
Heated Seats.................................................1-4
Reclining Seatbacks........................................1-4
Head Restraints.............................................1-6
Rear Seats.......................................................1-7
Split Folding Rear Seat...................................1-7
Safety Belts.....................................................1-9
Safety Belts: They Are for Everyone.................1-9
Questions and Answers About Safety Belts......1-13
How to Wear Safety Belts Properly.................1-14
Driver Position..............................................1-15
Safety Belt Use During Pregnancy..................1-22
Right Front Passenger Position.......................1-23
Center Front Passenger Position.....................1-23
Rear Seat Passengers..................................1-25
Rear Safety Belt Comfort Guides for Children
and Small Adults.......................................1-28
Safety Belt Extender.....................................1-30
Child Restraints.............................................1-31
Older Children..............................................1-31
Infants and Young Children............................1-33Child Restraint Systems.................................1-37
Where to Put the Restraint.............................1-40
Top Strap....................................................1-41
Top Strap Anchor Location.............................1-42
Lower Anchorages and Top Tethers for
Children (LATCH System)...........................1-43
Securing a Child Restraint Designed for the
LATCH System.........................................1-45
Securing a Child Restraint in a Rear Seat
Position...................................................1-45
Securing a Child Restraint in the Right Front
Seat Position............................................1-48
Air Bag Systems............................................1-51
Where Are the Air Bags?...............................1-54
When Should an Air Bag In¯ate?....................1-56
What Makes an Air Bag In¯ate?.....................1-57
How Does an Air Bag Restrain?.....................1-57
What Will You See After an Air Bag In¯ates? . . .1-58
Servicing Your Air Bag-Equipped Vehicle.........1-60
Restraint System Check..................................1-61
Checking Your Restraint Systems...................1-61
Replacing Restraint System Parts After a
Crash......................................................1-62
Section 1 Seats and Restraint Systems
1-1

To raise the rear seatback, follow these steps:
1. Raise the seatback up and make sure it latches.
Push and pull on the seatback to be sure it is
locked in position.
2. Reconnect the center
safety belt latch plate
to the buckle.
{CAUTION:
A safety belt that is improperly routed, not
properly attached, or twisted won't provide the
protection needed in a crash. The person
wearing the belt could be seriously injured.
CAUTION: (Continued)
CAUTION: (Continued)
After raising the rear seatback, always check
to be sure that the safety belts are properly
routed and attached, and are not twisted.
Make sure the safety belt label is pointing to the release
button, and that both are facing the front of the
vehicle. Make sure the belt is not twisted. Push and pull
on the latch plate to be sure it is secure.
{CAUTION:
If the seatback isn't locked, it could move
forward in a sudden stop or crash. That could
cause injury to the person sitting there. Always
press rearward on the seatback to be sure it
is locked.
When the seat is not in use, it should be kept in the
upright locked position.
1-8

Driver Position
This part describes the driver's restraint system.
Lap-Shoulder Belt
The driver has a lap-shoulder belt. Here's how to wear it
properly.
1. Close and lock the door.
2. Adjust the seat so you can sit up straight. To see
how, see ªSeatsº in the Index.3. Pick up the latch plate and pull the belt across you.
Don't let it get twisted.
The 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.
4. Push the latch plate into the buckle until it clicks.
Pull up on the latch plate to make sure it is secure.
If the belt isn't long enough, see
Safety Belt
Extender on page 1-30.
Make sure the release button on the buckle is
positioned so you would be able to unbuckle the
safety belt quickly if you ever had to.
1-15

Lap-Shoulder Belt
All rear seating positions have lap-shoulder belts. Here's
how to wear one properly.
1. Pick up the latch plate and pull the belt across you.
Don't let it get twisted.
The 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.2. Push the latch plate into the buckle until it clicks.
Pull up on the latch plate to make sure it is secure.
When the shoulder belt is pulled out all the way,
it will lock. If it does, let it go back all the way and
start again. If the belt is not long enough, see
Safety Belt Extender on page 1-30. Make sure the
release button on the buckle is positioned so
that you would be able to unbuckle the safety belt
quickly if you ever had to.
3. To make the lap part tight, pull down on the buckle
end of the belt as you pull up on the shoulder part.
1-26

{CAUTION:
People should never hold a baby in their arms
while riding in a vehicle. A baby doesn't weigh
much -- until a crash. During a crash a baby
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) baby will suddenly
become a 240-lb. (110 kg) force on a person's
arms. A baby should be secured in an
appropriate restraint.
1-34

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:
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
always should be secured in appropriate infant
restraints.
1-36

{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's
unprotected by any bony structure. This alone
could cause serious or fatal injuries. Young
children always should be secured in
appropriate child restraints.
Child Restraint Systems
An infant car bed (A), a special bed made for use in a
motor vehicle, is an infant restraint system designed
to restrain or position a child on a continuous ¯at
surface. Make sure that the infant's head rests toward
the center of the vehicle.
1-37

A booster seat (F-G) is a child restraint designed to
improve the ®t of the vehicle's safety belt system. Some
booster seats have a shoulder belt positioner, and
some high-back booster seats have a ®ve-point harness.
A booster seat can also help a child to see out the
window.
Q:How do child restraints work?
A:A child restraint system is any device designed for
use in a motor vehicle to restrain, seat, or position
children. A built-in child restraint system is a
permanent part of the motor vehicle. An add-on
child restraint system is a portable one, which
is purchased by the vehicle's owner.
For many years, add-on child restraints have used
the adult belt system in the vehicle. To help
reduce the chance of injury, the child also has to be
secured within the restraint. The vehicle's belt
system secures the add-on child restraint in the
vehicle, and the add-on child restraint's harness
system holds the child in place within the restraint.
One system, the three-point harness, has straps
that come down over each of the infant's shoulders
and buckle together at the crotch. The ®ve-point
harness system has two shoulder straps, two
hip straps and a crotch strap. A shield may take the
place of hip straps. A T-shaped shield has
shoulder straps that are attached to a ¯at pad which
rests low against the child's body. A shelf- or
armrest-type shield has straps that are attached to
a wide, shelf-like shield that swings up or to
the side.
1-39