2011 BUICK LACROSSE ECU

Black plate (2,1)Buick LaCrosse Owner Manual - 2011
3-2 Seats and Restraints
Adding Equipment to theAirbag-Equipped Vehicle . . . 3-42
Airbag System Check . . . . . . . . 3-43
Replacing Airbag System Parts After a Crash . . . . . . . . . 3-43
Child Restraints
Older Children . . . . . . . . . . . . . . . 3-44
Infants and Young
Children . . . . . . . . . . . . . . . . . . . . 3-46
Child Restraint Systems . . . . . 3-49
Where to Put the Restraint . . . 3-51
Lower Anchors and Tethers for Children
(LATCH System) . . . . . . . . . . . 3-52
Replacing LATCH System Parts After a Crash . . . . . . . . . 3-61
Securing Child Restraints (Rear Seat) . . . . . . . . . . . . . . . . . 3-61
Securing Child Restraints (Front Passenger Seat) . . . . 3-63
Head Restraints
The vehicle's front seats have
adjustable head restraints in the
outboard seating positions.
The vehicle's rear seats have
adjustable head restraints in the
outboard seating positions.
{WARNING
With head restraints that are
not installed and adjusted
properly, there is a greater
chance that occupants will suffer
a neck/spinal injury in a crash.
Do not drive until the head
restraints for all occupants are
installed and adjusted properly.
Adjust the head restraint so that the
top of the restraint is at the same
height as the top of the occupant's
head. This position reduces the
chance of a neck injury in a crash.

Black plate (3,1)Buick LaCrosse Owner Manual - 2011
Seats and Restraints 3-3
Front Seat
To raise or lower the head restraint,
press the release button located on
the side of the head restraint and
pull up or push the head restraint
down and release the button.
Pull and push on the head restraint
after the button is released to make
sure that it is locked in place.
The front head restraints are not
designed to be removed.
Rear Seat
Pull the head restraint up to raise it.
To lower the head restraint, press
the release button, located on the
head restraint post on the top of the
seatback, while you push the head
restraint down.Push down on the head restraint
after the button is released to make
sure that it is locked in place.
If you are installing a child restraint
in the rear seat, see
“Securing a
Child Restraint Designed for the
LATCH System” underLower
Anchors and Tethers for Children
(LATCH System) on page 3‑52.

Black plate (23,1)Buick LaCrosse Owner Manual - 2011
Seats and Restraints 3-23
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 thebuckle until it clicks.
Pull up on the latch plate to
make sure it is secure. If the belt
is not long enough, see Safety
Belt Extender on page 3‑27. Position the release button on
the buckle so that the safety belt
could be quickly unbuckled if
necessary.
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.
4. To make the lap part tight, pull up on the shoulder belt.
It may be necessary to pull
stitching on the safety belt
through the latch plate to fully
tighten the lap belt on smaller
occupants.
To unlatch the belt, push the button
on the buckle. The belt should
return to its stowed position. Slide
the latch plate up the safety belt
webbing, when the safety belt is not
in use. The latch plate should rest
on the stitching on the safety belt,
near the guide loop on the side wall.
Before a door is closed, be sure
the safety belt is out of the way. If a
door is slammed against a safety
belt, damage can occur to both the
safety belt and the vehicle.

Black plate (27,1)Buick LaCrosse Owner Manual - 2011
Seats and Restraints 3-27
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 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. 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 fit. 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.
Safety System Check
Now and then, check that the safety
belt reminder light, safety belts,
buckles, latch plates, retractors,
and anchorages are working
properly. Look for any other loose
or damaged safety belt system parts
that might keep a safety belt system
from doing its job. See your dealer
to have it repaired. Torn or frayed
safety belts may not protect you in
a crash. They can rip apart under
impact forces. If a belt is torn or
frayed, get a new one right away.
Make sure the safety belt reminder
light is working. See
Safety Belt
Reminders on page 5‑14 for more
information.
Keep safety belts clean and dry.
See Safety Belt Care on page 3‑28.

Black plate (30,1)Buick LaCrosse Owner Manual - 2011
3-30 Seats and Restraints
Here are the most important things
to know about the airbag system:
{WARNING
You can be severely injured or
killed in a crash if you are not
wearing a safety belt—even if
the vehicle has airbags. Airbags
are designed to work with safety
belts, but do not replace them.
Also, airbags are not designed to
deploy in every crash. In some
crashes safety belts are the only
restraint. See When Should an
Airbag Inflate? on page 3‑32.
Wearing a safety belt during a
crash helps reduce your chance
of hitting things inside the vehicle
or being ejected from it. Airbags
are “supplemental restraints” to
the safety belts. Everyone in the
vehicle should wear a safety belt
properly —whether or not there is
an airbag for that person.
{WARNING
Airbags inflate with great force,
faster than the blink of an eye.
Anyone who is up against, or
very close to, any airbag when it
inflates can be seriously injured
or killed. Do not sit unnecessarily
close to any airbag, as you would
be if you were sitting on the edge
of the seat or leaning forward.
Safety belts help keep you in
position before and during a
crash. Always wear a safety belt,
even with airbags. The driver
should sit as far back as possible
while still maintaining control of
the vehicle.
Occupants should not lean on
or sleep against the door or side
windows in seating positions with
seat-mounted side impact airbags
and/or roof-rail airbags.
{WARNING
Children who are up against,
or very close to, any airbag
when it inflates can be seriously
injured or killed. Airbags plus
lap-shoulder belts offer protection
for adults and older children,
but not for young children and
infants. Neither the vehicle's
safety belt system nor its airbag
system is designed for them.
Young children and infants
need the protection that a child
restraint system can provide.
Always secure children properly
in the vehicle. To read how, see
Older Children on page 3‑44 or
Infants and Young Children on
page 3‑46.

Black plate (32,1)Buick LaCrosse Owner Manual - 2011
3-32 Seats and Restraints
Rear Seat Driver Side Shown,Passenger Side Similar
If the vehicle has second row
seat‐mounted side impact airbags,
they are in the sides of the rear
seatback closest to the door.
{WARNING
If something is between an
occupant and an airbag, the
airbag might not inflate properly
or it might force the object into (Continued)
WARNING (Continued)
that person causing severe
injury or even death. The path
of an inflating airbag must be
kept clear. Do not put anything
between an occupant and an
airbag, and do not attach or put
anything on the steering wheel
hub or on or near any other
airbag covering.
Do not use seat accessories
that block the inflation path of a
seat-mounted side impact airbag.
Never secure anything to the roof
of a vehicle with roof-rail airbags
by routing a rope or tie down
through any door or window
opening. If you do, the path
of an inflating roof-rail airbag
will be blocked.
When Should an Airbag
Inflate?
Frontal airbags are designed
to inflate in moderate to severe
frontal or near frontal crashes to
help reduce the potential for severe
injuries mainly to the driver's or right
front passenger's head and chest.
However, they are only designed
to inflate if the impact exceeds
a predetermined deployment
threshold. Deployment thresholds
are used to predict how severe a
crash is likely to be in time for the
airbags to inflate and help restrain
the occupants.
Whether the frontal airbags will
or should deploy is not based on
how fast your vehicle is traveling.
It depends largely on what you hit,
the direction of the impact, and how
quickly your vehicle slows down.

Black plate (37,1)Buick LaCrosse Owner Manual - 2011
Seats and Restraints 3-37
Passenger Sensing
System
The vehicle has a passenger
sensing system for the right front
passenger position. The passenger
airbag status indicator will be visible
on the instrument panel when the
vehicle is started.
The words ON and OFF will be
visible during the system check.
If you are using remote start,if equipped, to start the vehicle from
a distance you may not see the
system check. When the system
check is complete, either the word
ON or the word OFF will be visible.
See
Passenger Airbag Status
Indicator on page 5‑15.
The passenger sensing system
turns off the right front passenger
frontal airbag under certain
conditions. The driver airbags,
seat‐mounted side impact airbags,
and roof‐rail airbags are not affected
by the passenger sensing system.
The passenger sensing system
works with sensors that are part
of the right front passenger seat. The sensors are designed to detect
the presence of a properly-seated
occupant and determine if the
right front passenger frontal airbag
should be enabled (may inflate)
or not.
According to accident statistics,
children are safer when properly
secured in a rear seat in the
correct child restraint for their
weight and size.
We recommend that children 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.

Black plate (38,1)Buick LaCrosse Owner Manual - 2011
3-38 Seats and Restraints
A label on the 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.
{WARNING
A child in a rear-facing child
restraint can be seriously
injured or killed if the right
front passenger airbag inflates.
This is because the back of the
rear-facing child restraint would
be very close to the inflating
airbag. A child in a forward-facing
child restraint can be seriously
injured or killed if the right front
passenger airbag inflates and the
passenger seat is in a forward
position.
(Continued)
WARNING (Continued)
Even if the passenger sensing
system has turned off the right
front passenger frontal airbag,
no system is fail-safe. No one
can guarantee that an airbag will
not deploy under some unusual
circumstance, even though the
airbag is turned off.
Secure rear-facing child
restraints 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. The passenger sensing system is
designed to turn off the right front
passenger frontal airbag if:.The right front passenger seat is
unoccupied.
.The system determines that an
infant is present in a rear-facing
infant seat.
.The system determines that a
small child is present in a child
restraint.
.The system determines that
a small child is present in a
booster seat.
.A right front passenger takes
his/her weight off of the seat for
a period of time.
.The right front passenger seat is
occupied by a smaller person,
such as a child who has
outgrown child restraints.
.Or, if there is a critical problem
with the airbag system or the
passenger sensing system.