ECU BUICK LACROSSE 2006 Workshop Manual

2. Use the wheel wrench to loosen the plastic wheel
nut caps, if equipped, in a counterclockwise
direction.
If needed, nish loosening them by hand. The nut
caps will not come off of the wheel cover.
3. Use the at end of the wheel wrench and pry along
the edge of the cover until it comes off. Pull off the
wheel cover and set it aside.
The edge of the wheel cover could be sharp, so do
not try to remove the cover with your bare hands.
Do not drop the cap or lay it face down, as it could
become scratched or damaged.
If the vehicle has aluminum wheels and wheel center
caps, the wheel nuts are hidden behind the center cap.
Pry off the center cap by using the at end of the
wheel wrench at the notch.
Do not drop the cap or lay it facedown, as it could
become scratched or damaged.Once you have removed the wheel cover or center
cap, use the following procedure to remove the at tire
and install the spare tire.
1. Place the wheel wrench securely over the wheel
nut. Turn the wheel wrench counterclockwise
to loosen all the wheel nuts, but do no remove
them yet.
2. Turn the jack handle clockwise to raise the jack
lift head.
5-77

Storing a Flat or Spare Tire
and Tools
{CAUTION:
Storing a jack, a tire, or other equipment in
the passenger compartment of the vehicle
could cause injury. In a sudden stop or
collision, loose equipment could strike
someone. Store all these in the proper place.
After the compact spare tire has been installed on the
vehicle, store the at tire in the trunk.
When storing a full-size tire, use the extension with the
protector, located in the foam holder, to help avoid
wheel surface damage.To store a full-size tire, do the following:
1. Install the tools in their original location in the
trunk area and secure.
2. Place the tire valve stem facing down and
the protector/guide placed through a wheel
bolt hole.
3. Remove the protector and attach the retainer
securely
4. Store the cover as far forward as possible.
When storing a compact spare tire in the trunk, put the
protector back in the foam holder.
The compact spare is for temporary use only. Replace
the compact spare tire with a full-size tire as soon
as you can. SeeCompact Spare Tire on page 5-83.
Use the following as a guide for storing the compact
spare tire and tools.
5-82

Engine Coolant Level Check
Check the engine coolant level and add
DEX-COOL®coolant mixture if necessary.
SeeEngine Coolant on page 5-24for further details.
Windshield Washer Fluid Level Check
Check the windshield washer uid level in the windshield
washer uid reservoir and add the proper uid if
necessary.
At Least Once a Month
Tire Ination Check
Visually inspect your vehicle’s tires and make sure they
are inated to the correct pressures. Do not forget to
check the spare tire. SeeTires on page 5-57for further
details. Check to make sure the spare tire is stored
securely. SeeChanging a Flat Tire on page 5-73.
Tire Wear Inspection
Tire rotation may be required for high mileage highway
drivers prior to the Engine Oil Life System service
notication. Check the tires for wear and, if necessary,
rotate the tires. SeeTire Inspection and Rotation on
page 5-64.
At Least Once a Year
Starter Switch Check
{CAUTION:
When you are doing this inspection, the
vehicle could move suddenly. If the vehicle
moves, you or others could be injured.
1. Before you start, be sure you have enough room
around the vehicle.
2. Firmly apply both the parking brake and the regular
brake. SeeParking Brake on page 2-30.
Do not use the accelerator pedal, and be ready to
turn off the engine immediately if it starts.
3. Try to start the engine in each gear. The vehicle
should start only in PARK (P) or NEUTRAL (N).
If the vehicle starts in any other position, contact
your GM Goodwrench
®dealer for service.
6-9

Flat Tire Change:Installation of a spare tire will be
covered at no charge. The customer is responsible
for the repair or replacement of the tire if not covered
by a warrantable failure.
Jump Start:No-start occurrences which require a
battery jump start will be covered at no charge.
Dealer Locator Service
In many instances, mechanical failures are covered
under Buick’s Bumper-to-Bumper warranty. However,
when other services are utilized, our Roadside
Assistance Representatives will explain any payment
obligations you might incur.
For prompt and efficient assistance when calling, please
provide the following to the Roadside Assistance
Representative:
Your name, home address, and home telephone
number.
Telephone number of your location.
Location of the vehicle.
Model, year, color, and license plate number.
Mileage, Vehicle Identication Number, and delivery
date of the vehicle.
Description of the problem.While we hope you never have the occasion to use our
service, it is added security while traveling for you
and your family. Remember, we are only a phone call
away. Buick Roadside Assistance:1-800-252-1112, text
telephone (TTY) users, call1-888-889-2438.
Buick reserves the right to limit services or
reimbursement to an owner or driver when, in Buick’s
judgement, the claims become excessive in frequency or
type of occurrence.
Roadside Assistance is not part of or included in the
coverage provided by the New Vehicle Limited Warranty.
Buick reserves the right to make any changes or
discontinue the Roadside Assistance program at any
time without notication.
Canadian Roadside Assistance
Vehicles purchased in Canada have an extensive
roadside assistance program accessible from anywhere
in Canada or the United States. Please refer to the
Warranty and Owner Assistance Information book.
7-7

Child Restraints
Child Restraint Systems...............................1-36
Infants and Young Children...........................1-33
Lower Anchors and Tethers for Children..........1-41
Older Children.............................................1-30
Securing a Child Restraint in a Rear Seat
Position..................................................1-49
Securing a Child Restraint in the Center Front
Seat Position...........................................1-51
Securing a Child Restraint in the Right Front
Seat Position...........................................1-52
Where to Put the Restraint...........................1-40
Chime Level Adjustment.................................3-130
Cigarette Lighter.............................................3-21
Cleaning
Aluminum or Chrome-Plated Wheels..............5-89
Exterior Lamps/Lenses.................................5-87
Fabric/Carpet..............................................5-85
Finish Care.................................................5-88
Inside of Your Vehicle..................................5-84
Instrument Panel, Vinyl, and Other Plastic
Surfaces.................................................5-86
Leather......................................................5-86
Tires..........................................................5-89
Underbody Maintenance...............................5-90
Washing Your Vehicle...................................5-87Cleaning (cont.)
Weatherstrips..............................................5-87
Windshield and Wiper Blades........................5-88
Climate Control System...................................3-22
Air Filter, Passenger Compartment.................3-30
Dual Automatic............................................3-25
Outlet Adjustment........................................3-29
Steering Wheel Controls...............................3-31
Collision Damage Repair..................................7-11
Comfort Guides, Rear Safety Belt.....................1-27
Compact Spare Tire........................................5-83
Compass.......................................................3-57
Content Theft-Deterrent....................................2-18
Control of a Vehicle.......................................... 4-6
Convenience Net............................................2-46
Coolant
Engine Temperature Gage............................3-41
Engine Temperature Warning Light.................3-40
Heater, Engine............................................2-25
Low Warning Light.......................................3-41
Cooling System..............................................5-30
Courtesy Lamps.............................................3-16
Cruise Control................................................3-10
Cruise Control Light........................................3-46
Cupholder(s)..................................................2-45
3

Customer Assistance Information
Courtesy Transportation.................................. 7-8
Customer Assistance for Text Telephone
(TTY) Users.............................................. 7-4
Customer Assistance Offices........................... 7-4
Customer Satisfaction Procedure..................... 7-2
GM Mobility Reimbursement Program............... 7-6
Reporting Safety Defects to General Motors....7-15
Reporting Safety Defects to the Canadian
Government............................................7-14
Reporting Safety Defects to the United
States Government...................................7-14
Roadside Assistance Program......................... 7-6
Service Publications Ordering Information........7-15
D
Daytime Running Lamps/Automatic Headlamp
System......................................................3-14
Defensive Driving............................................. 4-2
Delayed Entry Lighting.....................................3-17
Delayed Exit Lighting.......................................3-17
Delayed Locking.............................................2-11
DIC Compass.................................................3-57
Doing Your Own Service Work........................... 5-4Door
Ajar Light...................................................3-47
Automatic Door Lock....................................2-12
Delayed Locking..........................................2-11
Locks........................................................2-10
Power Door Locks.......................................2-11
Rear Door Security Locks.............................2-12
Driver
Position, Safety Belt.....................................1-16
Driver Information Center (DIC).........................3-50
DIC Operation and Displays..........................3-51
DIC Vehicle Personalization..........................3-75
DIC Warnings and Messages........................3-59
Driving
At Night.....................................................4-16
City...........................................................4-20
Defensive..................................................... 4-2
Drunken....................................................... 4-3
Freeway.....................................................4-21
Hill and Mountain Roads..............................4-24
In Rain and on Wet Roads...........................4-17
Rocking Your Vehicle to Get it Out.................4-31
Winter........................................................4-26
Dual Automatic Climate Control System.............3-25
4

Light (cont.)
Malfunction Indicator....................................3-41
Oil Pressure...............................................3-44
Passenger Airbag Status Indicator..................3-35
Passenger Safety Belt Reminder....................3-34
Reduced Engine Power................................3-46
Safety Belt Reminder...................................3-33
Security.....................................................3-46
Service Vehicle Soon...................................3-48
TCS Warning Light......................................3-40
Traction Control System (TCS) Warning..........3-40
Trunk Ajar..................................................3-48
Lighting
Delayed Entry.............................................3-17
Delayed Exit...............................................3-17
Entry.........................................................3-16
Perimeter...................................................3-18
Theater Dimming.........................................3-17
Loading Your Vehicle.......................................4-31
Lockout Protection..........................................2-13
Locks
Automatic Door Lock....................................2-12
Delayed Locking..........................................2-11
Door..........................................................2-10
Lockout Protection.......................................2-13
Power Door................................................2-11
Rear Door Security Locks.............................2-12
Loss of Control...............................................4-15Low Coolant Warning Light..............................3-41
Low Fuel Warning Light...................................3-49
Low Washer Fluid Warning Light.......................3-47
Lumbar
Power Controls............................................. 1-3
M
Maintenance Schedule
Additional Required Services........................... 6-6
At Each Fuel Fill........................................... 6-8
At Least Once a Month.................................. 6-9
At Least Once a Year.................................... 6-9
Introduction.................................................. 6-2
Maintenance Footnotes.................................. 6-7
Maintenance Record....................................6-14
Maintenance Requirements............................. 6-2
Normal Maintenance Replacement Parts.........6-13
Owner Checks and Services........................... 6-8
Recommended Fluids and Lubricants.............6-12
Scheduled Maintenance................................. 6-4
Using.......................................................... 6-3
Your Vehicle and the Environment................... 6-2
Malfunction Indicator Light................................3-41
Manual Seats................................................... 1-2
Message
DIC Warnings and Messages........................3-59
8

Power
Accessory Outlet(s)......................................3-20
Door Locks.................................................2-11
Electrical System.........................................5-93
Lumbar Controls........................................... 1-3
Reduced Engine Light..................................3-46
Retained Accessory (RAP)............................2-23
Six-Way Seats.............................................. 1-3
Steering Fluid.............................................5-37
Windows....................................................2-17
Pretensioners, Safety Belt................................1-29
Q
Questions and Answers About Safety Belts.........1-14
R
Radiator Pressure Cap....................................5-27
Radios..........................................................3-84
Care of Your CD Player..............................3-129
Care of Your CDs......................................3-128
Radio with CD............................3-86, 3-90, 3-99
Radio with Six-Disc CD..............................3-113
Setting the Time..........................................3-85
Theft-Deterrent..........................................3-126
Understanding Reception............................3-128
Rear Assist Handle Reading Lamps...................3-18Rear Door Security Locks................................2-12
Rear Safety Belt Comfort Guides......................1-27
Rear Seat Passengers, Safety Belts..................1-25
Rearview Mirror, Automatic Dimming..................2-36
Rearview Mirror, Automatic Dimming
with OnStar
®..............................................2-37
Rearview Mirror with OnStar®...........................2-36
Rearview Mirrors.............................................2-36
Reclining Seatbacks.......................................... 1-4
Recommended Fluids and Lubricants.................6-12
Recreational Vehicle Towing.............................4-36
Reduced Engine Power Light............................3-46
Remote Keyless Entry System............................ 2-3
Remote Keyless Entry System, Operation............ 2-4
Removing the Flat Tire and Installing the
Spare Tire..................................................5-76
Removing the Spare Tire and Tools...................5-74
Replacement Bulbs.........................................5-56
Replacement, Windshield.................................5-56
Reporting Safety Defects
Canadian Government..................................7-14
General Motors...........................................7-15
United States Government............................7-14
Restraint System Check
Checking the Restraint Systems....................1-71
Replacing Restraint System Parts After
a Crash..................................................1-72
Retained Accessory Power (RAP)......................2-23
Right Front Passenger Position, Safety Belts......1-23
10

Roadside
Assistance Program....................................... 7-6
Rocking Your Vehicle to Get it Out....................4-31
Running the Engine While Parked.....................2-35
S
Safety Belt
Passenger Reminder Light............................3-34
Pretensioners..............................................1-29
Reminder Light............................................3-33
Safety Belts
Care of......................................................5-87
Center Front Passenger Position....................1-24
Driver Position............................................1-16
How to Wear Safety Belts Properly................1-15
Questions and Answers About Safety Belts.....1-14
Rear Safety Belt Comfort Guides...................1-27
Rear Seat Passengers.................................1-25
Right Front Passenger Position......................1-23
Safety Belt Extender....................................1-30
Safety Belt Use During Pregnancy.................1-23
Safety Belts Are for Everyone.......................1-10
Shoulder Belt Height Adjuster........................1-22
Safety Warnings and Symbols.............................. iii
Scheduled Maintenance..................................... 6-4Seats
Center Seat.................................................. 1-8
Head Restraints............................................ 1-7
Heated Seats............................................... 1-4
Manual........................................................ 1-2
Power Lumbar.............................................. 1-3
Reclining Seatbacks...................................... 1-4
Six-Way Power Seats.................................... 1-3
Split Folding Rear Seat.................................. 1-8
Securing a Child Restraint
Center Front Seat Position............................1-51
Rear Seat Position......................................1-49
Right Front Seat Position..............................1-52
Security Light.................................................3-46
Service........................................................... 5-3
Accessories and Modications......................... 5-3
Adding Equipment to the Outside of Your
Vehicle..................................................... 5-5
California Proposition 65 Warning.................... 5-4
Doing Your Own Work................................... 5-4
Engine Soon Light.......................................3-41
Publications Ordering Information...................7-15
Vehicle Soon Light.......................................3-48
Servicing Your Airbag-Equipped Vehicle..............1-69
Setting the Time.............................................3-85
Sheet Metal Damage.......................................5-90
11