BUICK LESABRE 2004 Repair Manual

In many crashes severe enough to inate an air bag,
windshields are broken by vehicle deformation.
Additional windshield breakage may also occur from the
right front passenger air bag.
Air bags are designed to inate only once. After an
air bag inates, you’ll need some new parts for
your air bag system. If you don’t get them, the air
bag system won’t be there to help protect you
in another crash. A new system will include air bag
modules and possibly other parts. The service
manual for your vehicle covers the need to replace
other parts.
Your vehicle is equipped with an electronic frontal
sensor, which helps the sensing system distinguish
between a moderate frontal impact and a more
severe frontal impact. Your vehicle is also equipped
with a crash sensing and diagnostic module,
which records information about the frontal air bag
system. The module records information about
the readiness of the system, when the system
commands air bag ination and driver’s safety belt
usage at deployment. The module also records
speed, engine rpm, brake and throttle data.
Let only qualied technicians work on your air bag
systems. Improper service can mean that an air
bag system won’t work properly. See your dealer for
service.
Notice:If you damage the covering for the driver’s
or the right front passenger’s air bag, or the air
bag covering on the driver’s and right front
passenger’s seatback, the bag may not work
properly. You may have to replace the air bag
module in the steering wheel, both the air bag
module and the instrument panel for the right front
passenger’s air bag, or both the air bag module
and seatback for the driver’s and right front
passenger’s side impact air bag. Do not open or
break the air bag coverings.
1-55

Servicing Your Air Bag-Equipped
Vehicle
Air bags affect how your vehicle should be serviced.
There are parts of the air bag systems in several places
around your vehicle. Your dealer and the service
manual have information about servicing your vehicle
and the air bag systems. To purchase a service manual,
seeService Publications Ordering Information on
page 7-11.
{CAUTION:
For up to 10 seconds after the ignition key is
turned off and the battery is disconnected, an
air bag can still inate during improper
service. You can be injured if you are close to
an air bag when it inates. Avoid yellow
connectors. They are probably part of the air
bag system. Be sure to follow proper service
procedures, and make sure the person
performing work for you is qualied to do so.
The air bag systems do not need regular maintenance.
Restraint System Check
Checking Your Restraint Systems
Now and then, make sure the safety belt reminder light
and all your belts, buckles, latch plates, retractors
and anchorages are working properly. Look for any other
loose or damaged safety belt system parts. If you see
anything that might keep a safety belt system from doing
its job, 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.
Also look for any opened or broken air bag covers, and
have them repaired or replaced. (The air bag system
does not need regular maintenance.)
1-56

Replacing Restraint System Parts
After a Crash
{CAUTION:
A crash can damage the restraint systems in
your vehicle. A damaged restraint system may
not properly protect the person using it,
resulting in serious injury or even death in a
crash. To help make sure your restraint
systems are working properly after a crash,
have them inspected and any necessary
replacements made as soon as possible.If you’ve had a crash, do you need new belts or LATCH
system parts?
After a very minor collision, nothing may be necessary.
But if the belts were stretched, as they would be if
worn during a more severe crash, then you need new
parts.
If the LATCH system was being used during a more
severe crash, you may need new LATCH system parts.
If belts are cut or damaged, replace them. Collision
damage also may mean you will need to have LATCH
system, safety belt or seat parts repaired or replaced.
New parts and repairs may be necessary even if the belt
or LATCH system wasn’t being used at the time of
the collision.
If your seat adjuster won’t work after a crash, the
special part of the safety belt that goes through the seat
to the adjuster may need to be replaced.
If an air bag inates, you’ll need to replace air bag
system parts. See the part about the air bag system
earlier in this manual.
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✍NOTES
1-58

Keys...............................................................2-3
Remote Keyless Entry System.........................2-5
Remote Keyless Entry System Operation...........2-5
Doors and Locks.............................................2-9
Door Locks....................................................2-9
Central Door Unlocking System......................2-10
Power Door Locks........................................2-10
Door Ajar Reminder......................................2-11
Delayed Locking...........................................2-11
Programmable Automatic Door Locks..............2-12
Rear Door Security Locks..............................2-13
Lockout Protection........................................2-13
Leaving Your Vehicle....................................2-13
Trunk..........................................................2-14
Windows........................................................2-16
Power Windows............................................2-17
Sun Visors...................................................2-17
Theft-Deterrent Systems..................................2-18
Content Theft-Deterrent.................................2-18
PASS-Key
®III ..............................................2-19
PASS-Key®III Operation...............................2-20Starting and Operating Your Vehicle................2-21
New Vehicle Break-In....................................2-21
Ignition Positions..........................................2-22
Starting Your Engine.....................................2-23
Engine Coolant Heater..................................2-24
Automatic Transaxle Operation.......................2-25
Parking Brake..............................................2-27
Shifting Into Park (P).....................................2-28
Shifting Out of Park (P).................................2-30
Parking Over Things That Burn.......................2-31
Engine Exhaust............................................2-31
Running Your Engine While You Are Parked. . . .2-32
Mirrors...........................................................2-33
Manual Rearview Mirror.................................2-33
Automatic Dimming Rearview Mirror................2-33
Automatic Dimming Rearview Mirror with
Compass.................................................2-33
Outside Power Mirrors...................................2-35
Outside Curb View Assist Mirror.....................2-36
Outside Convex Mirror...................................2-36
Outside Automatic Dimming
Heated Mirror...........................................2-36
Section 2 Features and Controls
2-1

OnStar®System.............................................2-37
HomeLink®Transmitter...................................2-38
Programming the HomeLink®Transmitter.........2-39
Storage Areas................................................2-42
Glove Box...................................................2-42
Center Console Storage Area.........................2-42
Convenience Net..........................................2-42Sunroof.........................................................2-43
Vehicle Personalization...................................2-44
Memory Seat and Mirrors..............................2-44
Section 2 Features and Controls
2-2

Keys
{CAUTION:
Leaving children in a vehicle with the ignition
key is dangerous for many reasons. A child or
others could be badly injured or even killed.
They could operate the power windows or
other controls or even make the vehicle move.
Do not leave the keys in a vehicle with
children.
2-3

There is a master key that
works in all of the lock
cylinders (driver’s
door, trunk, ignition, and
glove box).
There is also a VALET key
which operates only the
driver’s door and the
ignition.Your vehicle has the PASS-Key®III vehicle theft
system. Both the master and VALET key have a
transponder in the key head that matches a decoder in
the vehicle’s steering column. If a replacement key
or any additional key is needed, you must purchase this
key from your dealer. The key will have PK3 stamped
on it. Keep the bar code tag that came with the original
keys. Give this tag to your dealer if you need a new
key made.
Any new PASS-Key
®III key must be programmed
before it will start your vehicle. SeePASS-Key®III on
page 2-19for more information on programming
your new key.
If your vehicle is equipped with the OnStar
®System
with an active subscription and you lock your keys inside
the vehicle, OnStar
®may be able to send a command
to unlock your vehicle. SeeOnStar®System on
page 2-37for more information.
Notice:If you ever lock your keys in your vehicle,
you may have to damage the vehicle to get in.
Be sure you have spare keys.
2-4

Remote Keyless Entry System
Your keyless entry system operates on a radio
frequency subject to Federal Communications
Commission (FCC) Rules and with Industry Canada.
This device complies with Part 15 of the FCC Rules.
Operation is subject to the following two conditions:
1. This device may not cause interference, and
2. This device must accept any interference received,
including interference that may cause undesired
operation of the device.
This device complies with RSS-210 of Industry Canada.
Operation is subject to the following two conditions:
1. This device may not cause interference, and
2. This device must accept any interference received,
including interference that may cause undesired
operation of the device.
Changes or modications to this system by other than
an authorized service facility could void authorization to
use this equipment.At times you may notice a decrease in range. This is
normal for any remote keyless entry system. If the
transmitter does not work or if you have to stand closer
to your vehicle for the transmitter to work, try this:
Check the distance. You may be too far from your
vehicle. You may need to stand closer during
rainy or snowy weather.
Check the location. Other vehicles or objects may
be blocking the signal. Take a few steps to the
left or right, hold the transmitter higher, and
try again.
Check to determine if battery replacement is
necessary. See “Battery Replacement” under
Remote Keyless Entry System Operation on
page 2-5.
If you are still having trouble, see your dealer or a
qualied technician for service.
Remote Keyless Entry System
Operation
With this feature, you can lock and unlock your doors
or unlock your trunk from about 3 feet (1 m) up to
30 feet (9 m) away using the remote keyless entry
transmitter supplied with your vehicle.
2-5

If your vehicle is equipped with the DIC, the numbers on
the back of your transmitter correspond to DRIVER #1
and DRIVER #2 on the DIC. For more information
seeDriver Information Center (DIC) on page 3-45.
W(Unlock):Press this
button to unlock the
driver’s door. Press it again
within ve seconds to
unlock all of the doors. See
“Security Feedback”
later in this section.
Pressing the unlock button may also illuminate the
interior lamps. See “Entry Lighting” underInterior Lamps
on page 3-17.
Q(Lock):Press this button to lock all doors.
V(Trunk):Press this button to unlock the trunk
when the ignition is in OFF. It will also work when the
ignition is on, but only while the transaxle is in PARK (P)
or NEUTRAL (N).
L(Instant Alarm):Press this button to make the
horn sound and the headlamps and taillamps ash for
up to 30 seconds. This can be turned off by pressing the
instant alarm button again or by turning the ignition
on. If your vehicle is equipped with the content
theft-deterrent feature, you may also turn off the instant
alarm by unlocking the vehicle with a key.
Personalization Features
The following features, if available on your vehicle, can
be programmed to each driver’s preference.
Automatic Door Locks:This feature programs
your door locks to automatically lock or unlock
when shifting in and out of PARK (P).
Security Feedback:This feature provides feedback
to the driver when the vehicle receives a command
from the remote keyless entry transmitter.
2-6