2005 GMC ENVOY XL ECU

Front Seats......................................................1-3
Manual Seats................................................1-3
Power Seats..................................................1-4
Manual Lumbar..............................................1-5
Power Lumbar...............................................1-5
Heated Seats.................................................1-6
Reclining Seatbacks........................................1-7
Head Restraints.............................................1-9
Rear Seats.......................................................1-9
Rear Seat Operation.......................................1-9
Safety Belts...................................................1-12
Safety Belts: They Are for Everyone................1-12
Questions and Answers About Safety Belts......1-17
How to Wear Safety Belts Properly.................1-18
Driver Position..............................................1-18
Safety Belt Use During Pregnancy..................1-24
Right Front Passenger Position.......................1-24
Rear Seat Passengers..................................1-24
Rear Safety Belt Comfort Guides for
Children and Small Adults..........................1-27
Safety Belt Pretensioners...............................1-30
Safety Belt Extender.....................................1-30Child Restraints.............................................1-31
Older Children..............................................1-31
Infants and Young Children............................1-34
Child 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)...........................1-44
Securing a Child Restraint Designed for
the LATCH System....................................1-46
Securing a Child Restraint in a
Rear Outside Seat Position.........................1-46
Securing a Child Restraint in the Center
Seat Position............................................1-48
Securing a Child Restraint in the Right
Front Seat Position....................................1-49
Airbag System...............................................1-52
Where Are the Airbags?................................1-55
When Should an Airbag Inate?.....................1-57
What Makes an Airbag Inate?.......................1-59
How Does an Airbag Restrain?.......................1-59
Section 1 Seats and Restraint Systems
1-1

The rear seatback
levers are located on
the outboard side of
the rear seatbacks.
Pull the seatback toward you as you lift up on the lever.
The head restraint will automatically fold out of the
way when the seatback is folded down.
To raise the seatbacks, lift up the seatbacks and
push on them until they lock into the upright position.
Push and pull on the seatbacks to make sure that
they are latched securely. Then fold the bottom seat
cushion back into place.To return the head restraint to the upright position,
reach behind the seat and pull the restraint up until it
locks into place. Push and pull on the head restraint to
make sure that it is latched securely.
1-10

How to Wear Safety Belts Properly
This part is only for people of adult size.
Be aware that there are special things to know about
safety belts and children. And there are different
rules for smaller children and babies. If a child will be
riding in your vehicle, seeOlder Children on page 1-31
orInfants and Young Children on page 1-34. Follow
those rules for everyone’s protection.
First, you will want to know which restraint systems
your vehicle has.
We will start with the driver position.
Driver Position
Lap-Shoulder Belt
The driver has a lap-shoulder belt. Here is 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 “Seats” in the Index.3. Pick up the latch plate and pull the belt across you.
Do not 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 is not long enough, seeSafety 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.
1-18

Lap-Shoulder Belt
All rear seat positions have lap-shoulder belts.
Here is how to wear one properly.
1. Pick up the latch plate and pull the belt across you.
Do not 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 you would be able to unbuckle the
safety belt quickly if you ever had to.
3. To make the lap part tight, pull up on the
shoulder part.
1-25

Safety Belt Pretensioners
Your vehicle has safety belt pretensioners for the driver
and right front passenger. Although you cannot see
them, they are located on the retractor part of the safety
belts. They help the safety belts reduce a person’s
forward movement in a moderate to severe frontal, near
frontal or side crash or a rollover.
Pretensioners work only once. If they activate in a
crash, you will need to get new ones, and probably other
new parts for your safety belt system. SeeReplacing
Restraint System Parts After a Crash on page 1-68.
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. It is free. 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, just attach it to the regular
safety belt. For more information, see the instruction
sheet that comes with the extender.
1-30

Infants and Young Children
Everyone in a vehicle needs protection! This includes
infants and all other children. Neither the distance
traveled nor the age and size of the traveler changes
the need, for everyone, to use safety restraints. In fact,
the law in every state in the United States and in
every Canadian province says children up to some
age must be restrained while in a vehicle.
Every time infants and young children ride in vehicles,
they should have the protection provided by appropriate
restraints. Young children should not use the vehicle’s
adult safety belts alone, unless there is no other choice.
Instead, they need to use a child restraint.
{CAUTION:
People should never hold a baby in their arms
while riding in a vehicle. A baby does not 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

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.
{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 always should be secured in
appropriate child restraints.
1-36

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.
When choosing a child restraint, be sure the child
restraint is designed to be used in a vehicle. If it is,
it will have a label saying that it meets federal motor
vehicle safety standards.
Then follow the instructions for the restraint. You may
nd these instructions on the restraint itself or in a
booklet, or both. These restraints use the belt system or
the LATCH system in your vehicle, but the child also
has to be secured within the restraint to help reduce the
chance of personal injury. 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.
1-39