2006 BUICK LACROSSE wiring

Adding Equipment to Your
Airbag-Equipped Vehicle
Q:Is there anything I might add to the front or
sides of the vehicle that could keep the
airbags from working properly?
A:Yes. If you add things that change your vehicle’s
frame, bumper system, height, front end or side
sheet metal, they may keep the airbag system
from working properly. Also, the airbag system
may not work properly if you relocate any of the
airbag sensors. If you have any questions about
this, you should contact Customer Assistance before
you modify your vehicle. The phone numbers and
addresses for Customer Assistance are in Step Two
of the Customer Satisfaction Procedure in this
manual. SeeCustomer Satisfaction Procedure
on page 7-2.
Q:Because I have a disability, I have to get my
vehicle modied. How can I nd out whether
this will affect my airbag system?
A:Changing or moving any parts of the front seats,
safety belts, the airbag sensing and diagnostic
module, steering wheel, instrument panel, ceiling
headliner, ceiling and pillar garnish trim,
roof-mounted airbag modules, or airbag wiring can
affect the operation of the airbag system. If you have
questions, call Customer Assistance. The phone
numbers and addresses for Customer Assistance
are in Step Two of the Customer Satisfaction
Procedure in this manual. SeeCustomer Satisfaction
Procedure on page 7-2.
1-70

When you want to open a rear door when the security
lock is on, do the following:
1. Unlock the door using the remote keyless entry
transmitter, if equipped, the power door lock
switch, or by lifting the rear door manual lock.
2. Open the door from the outside.
To cancel the rear door security lock, do the following:
1. Unlock the door and open it from the outside.
2. Insert the key into the security lock slot and turn
it so the slot is in the vertical position.
Lockout Protection
The lockout protection feature makes it more difficult
to lock the key in the vehicle. If the driver’s door is open
while the key is in the ignition, the door cannot be locked
with the power door lock switch.
This feature cannot guarantee that you will never be
locked out of the vehicle. If the key is not left in the
ignition, or, if the manual door lock is used, the key
could still be locked inside the vehicle. Always
remember to take the key with you.
Trunk
{CAUTION:
It can be dangerous to drive with the trunk lid
open because carbon monoxide (CO) gas can
come into your vehicle. You cannot see or
smell CO. It can cause unconsciousness and
even death. If you must drive with the trunk lid
open or if electrical wiring or other cable
connections must pass through the seal
between the body and the trunk lid:
Make sure all other windows are shut.
Turn the fan on your heating or cooling
system to its highest speed and select the
control setting that will force outside air
into your vehicle. See Climate Control
System.
If you have air outlets on or under the
instrument panel, open them all the way.
SeeEngine Exhaust on page 2-34.
2-13

Passenger Safety Belt
Reminder Light
Several seconds after the key is turned to RUN or
START, a chime will sound for several seconds to
remind the front passenger to buckle their safety belt.
This would only occur if the passenger airbag is enabled.
SeePassenger Sensing System on page 1-65for more
information. The passenger safety belt light will also
come on and stay on for several seconds, then it will
ash for several more.
If the passenger’s safety
belt is buckled, neither
the chime nor the light
will come on.
Airbag Readiness Light
There is an airbag readiness light on the instrument
panel, which shows the airbag symbol. The system
checks the airbag’s electrical system for malfunctions.
The system check includes the airbag modules, the
wiring and the crash sensing and diagnostic module.
For more information on the airbag system, seeAirbag
System on page 1-56.
This light will come on
when the vehicle is
started, and it will ash
for a few seconds. Then
the light should go out.
This means the system
is functioning properly.
If the airbag readiness light stays on after the vehicle
is started, or comes on as the vehicle is being driven,
there may be an electrical problem and the airbag
system may not work properly. Have the vehicle serviced
right away.
3-34

Turn Signals When Towing a Trailer
When towing a trailer, the vehicle may need a different
turn signal asher and/or extra wiring. Check with your
dealer. The arrows on the instrument panel will ash
whenever signaling a turn or lane change. Properly
hooked up, the trailer lamps will also ash, telling other
drivers you are about to turn, change lanes or stop.
When towing a trailer, the arrows on the instrument
panel will ash for turns even if the bulbs on the trailer
are burned out. You may think drivers behind you
are seeing your signal when they are not. It is important
to check occasionally to be sure the trailer bulbs are
still working.
Driving On Grades
Reduce speed and shift to a lower gearbeforestarting
down a long hill or steep downgrade. If the vehicle
is not shifted down, the brakes might have to be
used so much that they would get hot and no longer
work well.
On a long uphill grade, shift down and reduce the
vehicle’s speed to around 45 mph (70 km/h) to reduce
the possibility of engine and transaxle overheating.
If towing a trailer, you may want to drive in THIRD (3)
instead of AUTOMATIC OVERDRIVE (D). Shift to
a lower gear as needed.
Parking on Hills
{CAUTION:
You really should not park your vehicle, with
a trailer attached, on a hill. If something goes
wrong, your rig could start to move. People
can be injured, and both your vehicle and the
trailer can be damaged.
But if the rig ever has to be parked on a hill, here is
how to do it:
1. Apply the regular brakes, but do not shift into
PARK (P) yet.
2. Have someone place chocks under the trailer’s
wheels.
3. When the wheel chocks are in place, release the
regular brakes until the chocks absorb the load.
4. Reapply the regular brakes. Then apply the parking
brake, and shift to PARK (P).
5. Release the regular brakes.
4-43

Wheel Alignment and Tire Balance..................5-70
Wheel Replacement......................................5-70
Tire Chains..................................................5-72
If a Tire Goes Flat........................................5-72
Changing a Flat Tire.....................................5-73
Removing the Spare Tire and Tools................5-74
Removing the Flat Tire and Installing
the Spare Tire..........................................5-76
Storing a Flat or Spare Tire and Tools............5-82
Compact Spare Tire......................................5-83
Appearance Care............................................5-84
Cleaning the Inside of Your Vehicle.................5-84
Fabric/Carpet...............................................5-85
Leather.......................................................5-86
Instrument Panel, Vinyl, and Other
Plastic Surfaces........................................5-86
Care of Safety Belts......................................5-87
Weatherstrips...............................................5-87
Washing Your Vehicle...................................5-87
Cleaning Exterior Lamps/Lenses.....................5-87
Finish Care..................................................5-88Windshield and Wiper Blades.........................5-88
Aluminum or Chrome-Plated Wheels................5-89
Tires...........................................................5-89
Sheet Metal Damage.....................................5-90
Finish Damage.............................................5-90
Underbody Maintenance................................5-90
Chemical Paint Spotting.................................5-90
Vehicle Care/Appearance Materials..................5-91
Vehicle Identication......................................5-92
Vehicle Identication Number (VIN).................5-92
Service Parts Identication Label.....................5-92
Electrical System............................................5-93
Add-On Electrical Equipment..........................5-93
Headlamp Wiring..........................................5-93
Windshield Wiper Fuses................................5-93
Power Windows and Other Power Options.......5-93
Fuses and Circuit Breakers............................5-93
Instrument Panel Fuse Block..........................5-94
Underhood Fuse Block..................................5-95
Capacities and Specications..........................5-98
Section 5 Service and Appearance Care
5-2

5. Remove the two wing nuts holding the taillamp
assembly in place.
6. Pull out the taillamp assembly and disconnect the
wiring harness.A. Taillamp
B. Back-up
C. TaillampD. Stoplamp/Taillamp/
Turn Signal
E. Sidemarker
7. Turn the bulb socket counterclockwise to remove it.
8. Replace with a new bulb.
9. Turn the bulb socket clockwise to reinstall.
10. Reverse these steps to reinstall the taillamp
assembly.
5-55

Electrical System
Add-On Electrical Equipment
Notice:Don’t add anything electrical to your
vehicle unless you check with your dealer rst.
Some electrical equipment can damage your vehicle
and the damage wouldn’t be covered by your
warranty. Some add-on electrical equipment can
keep other components from working as they should.
Your vehicle has an airbag system. Before attempting
to add anything electrical to your vehicle, seeServicing
Your Airbag-Equipped Vehicle on page 1-69.
Headlamp Wiring
The headlamp wiring is protected by a circuit breaker
in the underhood fuse block. An electrical overload
will cause the headlamps to go on and off, or in some
cases to remain off. If this happens, have the headlamp
system checked right away.
Windshield Wiper Fuses
The windshield wiper motor is protected by a circuit
breaker and a fuse. If the motor overheats due to heavy
snow, etc., the wiper will stop until the motor cools.
If the overload is caused by some electrical problem,
have it xed.
Power Windows and Other
Power Options
Circuit breakers in the instrument panel fuse block
protect the power windows and other power accessories.
When the current load is too heavy, the circuit breaker
opens and closes, protecting the circuit until the
problem is xed.
Fuses and Circuit Breakers
The wiring circuits in the vehicle are protected from
short circuits by a combination of fuses, circuit breakers
and in the fuse block wiring itself. This greatly reduces
the chance of res caused by electrical problems.
Look at the silver-colored band inside the fuse. If the
band is broken or melted, replace the fuse. Make sure
a bad fuse is replaced with a new one of the identical
size and rating.
5-93

E
Electrical System
Add-On Equipment......................................5-93
Fuses and Circuit Breakers...........................5-93
Headlamp Wiring.........................................5-93
Instrument Panel Fuse Block.........................5-94
Power Windows and Other Power Options......5-93
Underhood Fuse Block.................................5-95
Windshield Wiper Fuses...............................5-93
Engine
Air Cleaner/Filter.........................................5-20
Battery.......................................................5-42
Change Engine Oil Light...............................3-45
Check and Service Engine Soon Light............3-41
Coolant......................................................5-24
Coolant Heater............................................2-25
Coolant Temperature Gage...........................3-41
Coolant Temperature Warning Light................3-40
Engine Compartment Overview......................5-12
Exhaust.....................................................2-34
Oil .............................................................5-15
Oil Life System...........................................5-18
Overheated Protection Operating Mode...........5-29
Overheating................................................5-27
Reduced Power Light...................................3-46
Starting......................................................2-24
Entry Lighting.................................................3-16Event Data Recorders (EDR)............................7-10
Extender, Safety Belt.......................................1-30
Exterior Lamps...............................................3-13
Exterior Lighting Battery Saver..........................3-15
F
Filter
Engine Air Cleaner......................................5-20
Finish Damage...............................................5-90
Flashers, Hazard Warning.................................. 3-6
Flash-to-Pass................................................... 3-8
Flat Tire........................................................5-72
Flat Tire, Changing.........................................5-73
Flat Tire, Storing.............................................5-82
Fluid
Automatic Transaxle.....................................5-21
Power Steering...........................................5-37
Windshield Washer......................................5-38
Fog Lamps....................................................3-15
Folding Rear Seat............................................ 1-8
Fuel............................................................... 5-5
Additives...................................................... 5-6
California Fuel.............................................. 5-6
Check Gas Cap Light...................................3-49
Filling a Portable Fuel Container....................5-10
Filling Your Tank........................................... 5-8
Fuels in Foreign Countries.............................. 5-7
5