ECU BUICK LACROSSE 2007 Workshop Manual

Hood Release
To open the hood, do the following:
1. Pull the interior hood
release handle with
this symbol on it.
It is located to the
left of the steering
column below the
instrument panel.
2. Push the secondary hood release lever,
located under the center of the hood
above the grille, up and to the right to
disengage it.
3. Lift the hood.
Before closing the hood, make sure all the ller
caps are properly secured. Pull the hood down
and close it rmly.
349

Radiator Pressure Cap
Notice:If the pressure cap is not tightly
installed, coolant loss and possible engine
damage may occur. Be sure the cap is properly
and tightly secured.
The radiator pressure cap is located in the front
of the engine compartment on the passenger’s
side of the vehicle. SeeEngine Compartment
Overview on page 350for more information
on location.
Engine Overheating
There is a coolant temperature gage and a
warning light on the instrument panel cluster that
indicate an overheated engine condition. See
Engine Coolant Temperature Gage on page 189
andEngine Coolant Temperature Warning Light
on page 188for more information.
In addition, if your vehicle is equipped with a
Driver Information Center (DIC), you will nd an
ENGINE COOLANT HOT and a REDUCED
POWER STOP WHEN SAFE message displayed
on the DIC. SeeDIC Warnings and Messages
on page 208for more information.
367

3. Pull up on the plastic retaining clip (C) while
pushing rearward on the headlamp. Align the
square cut-out on the retaining clip with
the notch on the headlamp.
4. Remove the screw (A) from the metal
headlamp retainer to pull up and release the
headlamp assembly.
5. Remove the push pin (B) retaining the front
fascia.6. Pull forward on the front fascia and then pull
the headlamp assembly out from the vehicle.
Moving the headlamp up and down slightly
may help with its removal.
You may have someone assist you with
this step.
7. Remove the access cover from behind the
bulb being replaced.
8. Turn the bulb socket one-quarter of a turn to
remove it from the headlamp assembly.
9. Holding the base of the socket, pull the old
bulb from the socket.
10. Replace with a new bulb.
11. Reverse all the steps to reassemble the
headlamp assembly.
When replacing the plastic retaining clip,
push down on it while pushing rearward on
the headlamp, making sure the headlamp
assembly is secure.
396

Tire Chains
{CAUTION:
If your vehicle has P225/55R17 size tires,
do not use tire chains, there is not
enough clearance.
Tire chains used on a vehicle without the
proper amount of clearance can cause
damage to the brakes, suspension or
other vehicle parts. The area damaged by
the tire chains could cause you to lose
control of your vehicle and you or others
may be injured in a crash.
Use another type of traction device
only if its manufacturer recommends
it for use on your vehicle and tire size
combination and road conditions.
Follow that manufacturer’s instructions.
CAUTION: (Continued)
CAUTION: (Continued)
To help avoid damage to your vehicle,
drive slowly, readjust or remove the
device if it is contacting your vehicle,
and do not spin your wheels.
If you do nd traction devices that will t,
install them on the front tires.
Notice:If your vehicle has a tire size other
than P225/55R17 size tires, use tire chains only
where legal and only when you must. Use only
SAE Class “S” type chains that are the proper
size for your tires. Install them on the front tires
and tighten them as tightly as possible with the
ends securely fastened. Drive slowly and follow
the chain manufacturer’s instructions. If you
can hear the chains contacting your vehicle,
stop and retighten them. If the contact
continues, slow down until it stops. Driving too
fast or spinning the wheels with chains on will
damage your vehicle.
424

2. Use the wheel wrench to loosen the plastic
wheel nut caps, if the vehicle has them, 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. Remove 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.
Removing the Wheel Nuts
430

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 437. Use the following as a guide
for storing the compact spare tire and tools.A. Cover
B. Retainer
C. Compact Spare Tire
D. Wing Nut
E. Jack
F. Wheel Wrench
G. Extension Protector
H. Foam Holder
I. Bolt Screw
Compact Spare Tire
436

At Each Fuel Fill
It is important to perform these underhood checks
at each fuel ll.
Engine Oil Level Check
Check the engine oil level and add the proper oil
if necessary. SeeEngine Oil on page 353for
further details.
Notice:It is important to check your oil
regularly and keep it at the proper level. Failure
to keep your engine oil at the proper level
can cause damage to your engine not covered
by your warranty.
Engine Coolant Level Check
Check the engine coolant level and add
DEX-COOL®coolant mixture if necessary. See
Engine Coolant on page 363for 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. See
Ination - Tire Pressure on page 409. Check to
make sure the spare tire is stored securely.
SeeChanging a Flat Tire on page 426.
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 416.
467

Roadside Assistance Program
In the U.S. call1-800-252-1112.
In Canada call1-800-268-6800.
Service available 24 hours a day, 365 days a year.
As the proud owner of a new Buick vehicle, you
are automatically enrolled in the Roadside
Assistance program. This value-added service is
intended to provide you with peace of mind as you
drive in the city or travel the open road.
Who is Covered?
Roadside Assistance coverage is for the vehicle
operator, regardless of ownership. A person driving
this vehicle without the consent of the owner is not
eligible for coverage.The following services are provided in the U.S.
during the Bumper-to-Bumper warranty period and,
in Canada, during the Base Warranty coverage
period of the New Vehicle Limited Warranty, up to a
maximum coverage of $100.
Fuel Delivery:Delivery of enough fuel for the
customer to get to the nearest service station
(approximately $5 in the U.S. and 10 litres in
Canada). Service to provide diesel may be
restricted. For safety reasons, propane and
other alternative fuels will not be provided
through this service.
Lock-out Service:To ensure security, the
driver must present the vehicle registration and
personal ID before lock-out service is provided.
Lock-out service will be covered at no charge if
you are unable to gain entry into your vehicle.
If your vehicle will not start, Roadside
Assistance will arrange to have your vehicle
towed to the nearest authorized dealership. In
the U.S., replacement keys made at the
customer’s expense will be covered within
10 miles (16 km).
484

Alternative Service:There may be times,
when Roadside Assistance cannot provide
timely assistance, your advisor may authorize
you to secure local emergency road service,
and you will be reimbursed up to $100 upon
submission of the original receipt to Roadside
Assistance.
In many instances, mechanical failures are covered
under Buick’s Bumper-to-Bumper warranty for U.S.
customers, and the duration of the Base Warranty
Coverage for Canadian customers of the new
Vehicle Limited Warranty. However, any cost for
parts and labor for non-warranty repairs are the
responsibility of the driver.
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.
Odometer reading, 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. U.S. customers call Buick
Roadside Assistance:1-800-252-1112, TTY
users, call1-888-889-2438, Canadian customers
call1-800-268-6800.
Buick and General Motors of Canada Limited
reserve the right to limit services or reimbursement
to an owner or driver when, in their sole discretion,
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 and General Motors of Canada
Limited reserve the right to make any changes or
discontinue the Roadside Assistance program
at any time without notication.
486

C
Calibration................................................... 206
California Fuel............................................. 344
California Proposition 65 Warning................ 341
Canadian Owners........................................... 3
Capacities and Specications...................... 454
Carbon Monoxide..............100, 122, 314, 327
Care of
Safety Belts............................................. 442
Your CD Player........................................ 282
Your CDs ................................................. 282
CD, MP3 ..................................................... 272
Center Console Storage Area...................... 142
Center Front Passenger Position,
Safety Belts............................................... 31
Center Seat.................................................. 14
Chains, Tire................................................. 424
Charging System Light................................ 185
Check
Engine Light............................................ 190
Check Gas Cap Light.................................. 199
Checking Things Under the Hood................ 348
Chemical Paint Spotting.............................. 446Child Restraints
Child Restraint Systems............................. 45
Infants and Young Children........................ 42
Lower Anchors and Tethers for Children..... 51
Older Children........................................... 39
Securing a Child Restraint in a Rear
Seat Position.......................................... 58
Securing a Child Restraint in the Center
Front Seat Position................................. 61
Securing a Child Restraint in the Right
Front Seat Position................................. 61
Where to Put the Restraint........................ 50
Chime Level Adjustment .............................. 284
Cigarette Lighter.......................................... 168
Cleaning
Aluminum or Chrome-Plated Wheels........ 444
Exterior Lamps/Lenses............................. 443
Fabric/Carpet........................................... 440
Finish Care.............................................. 443
Inside of Your Vehicle .............................. 438
Instrument Panel, Vinyl, and Other
Plastic Surfaces.................................... 441
Leather.................................................... 441
Tires........................................................ 445
499