check engine BUICK LACROSSE 2007 Service Manual

7. Put the cap back on the coolant recovery tank,
but leave the radiator pressure cap off.
8. Start the engine and let it run until you can
feel the upper radiator hose getting hot.
Watch out for the engine cooling fans.9. By this time, the coolant level inside the
radiator ller neck may be lower. If the level is
lower, add more of the proper DEX-COOL
®
coolant mixture through the ller neck until the
level reaches the base of the ller neck.
10. Then replace the radiator pressure cap.
At any time during this procedure if coolant
begins to ow out of the ller neck, reinstall
the pressure cap. Be sure the pressure cap
is hand-tight and fully seated.
11. Check the coolant in the recovery tank. The
level in the coolant recovery tank should be
at the cold ll line when the engine is cold.
376

5. Then ll the coolant recovery tank to the
cold ll line.
6. Reinstall the coolant recovery tank cap and
the pressure cap.
7. If the coolant in the recovery tank is constantly
low, you should have your dealership service
department inspect the vehicle for leaks.
Power Steering Fluid
SeeEngine
Compartment Overview
on page 350for
reservoir location.
When to Check Power Steering Fluid
It is not necessary to regularly check power
steering uid unless you suspect there is a leak
in the system or you hear an unusual noise.
A uid loss in this system could indicate a problem.
Have the system inspected and repaired.
378

How to Check Power Steering Fluid
To check the power steering uid, do the following:
1. Turn the key off and let the engine
compartment cool down.
2. Wipe the cap and the top of the reservoir clean.
3. Unscrew the cap and wipe the dipstick with
a clean rag.
4. Replace the cap and completely tighten it.
5. Remove the cap again and look at the
uid level on the dipstick.
If your vehicle has the 3.8L V6 engine, the uid
level should be between the ADD and HOT marks
when the engine is cold, and at the HOT mark
when the engine is hot. If the uid is at the
ADD mark when the engine is cold or hot, power
steering uid should be added.If your vehicle has the 3.6L V6 engine, the uid
level should be between the Min (Minimum)
and Max (Maximum) marks when the engine is
cold, and at the Max mark when the engine is hot.
If the uid is at the Min mark when the engine
is cold or hot, power steering uid should be
added.
What to Use
To determine what kind of uid to use, see
Recommended Fluids and Lubricants on page 470.
Always use the proper uid. Failure to use the
proper uid can cause leaks and damage hoses
and seals.
379

5. Check that the jumper cables do not have
loose or missing insulation. If they do, you
could get a shock. The vehicles could
be damaged too.
Before you connect the cables, here are some
basic things you should know. Positive (+)
will go to positive (+) or to a remote positive (+)
terminal if the vehicle has one. Negative will
go to a heavy, unpainted metal engine part or
to a remote negative (−) terminal if the
vehicle has one.
Notice:If you connect a negative cable to the
Engine Control Module (ECM), ECM mounting
bracket or any cables that attach to the
ECM bracket, you may damage the ECM.
Attach the negative cable to a heavy, unpainted
metal engine part, other than the ECM, ECM
bracket or cables attached to the ECM bracket.
Do not connect positive (+) to negative (−), or
you will get a short that would damage the
battery and maybe other parts too. And do
not connect the negative (−) cable to the
negative (−) terminal on the dead battery
because this can cause sparks.6. Connect the red positive (+) cable to the
positive (+) terminal location on the vehicle
with the dead battery. Use a remote
positive (+) terminal if the vehicle has one.
3.8L V6 Engine shown, 3.6L V6 Engine similar
388

Maintenance Schedule................................ 458
Introduction............................................... 458
Maintenance Requirements........................ 458
Your Vehicle and the Environment............ 459
Using the Maintenance Schedule............... 459
Scheduled Maintenance............................. 462
Additional Required Services..................... 464
Maintenance Footnotes.............................. 465Owner Checks and Services..................... 466
At Each Fuel Fill....................................... 467
At Least Once a Month............................. 467
At Least Once a Year............................... 468
Recommended Fluids and Lubricants........ 470
Normal Maintenance Replacement Parts..... 471
Engine Drive Belt Routing......................... 472
Maintenance Record.................................. 473
Section 6 Maintenance Schedule
457

Maintenance Schedule
Introduction
Important: Keep engine oil at the proper level
and change as recommended.
Have you purchased the GM Protection Plan? The
Plan supplements your new vehicle warranties.
See your Warranty and Owner Assistance booklet
or your dealer for details.
Maintenance Requirements
Notice:Maintenance intervals, checks,
inspections, replacement parts, and
recommended uids and lubricants as
prescribed in this manual are necessary to keep
your vehicle in good working condition. Any
damage caused by failure to follow scheduled
maintenance may not be covered by warranty.
458

Scheduled Maintenance
When the change engine oil light or CHANGE OIL
SOON DIC message comes on, it means that
service is required for your vehicle. Have
your vehicle serviced as soon as possible within
the next 600 miles (1 000 km). It is possible that, if
you are driving under the best conditions, the
engine oil life system may not indicate that vehicle
service is necessary for over a year. However,
the engine oil and lter must be changed at least
once a year and at this time the system must
be reset. Your GM Goodwrench
®dealer has
GM-trained service technicians who will perform
this work using genuine GM parts and reset
the system.
If the engine oil life system is ever reset
accidentally, you must service your vehicle within
3,000 miles (5 000 km) since the last service.
Remember to reset the oil life system whenever
the oil is changed. SeeEngine Oil Life System on
page 356for information on the Engine Oil Life
System and resetting the system.When the light or message appears, certain
services, checks, and inspections are required.
Required services are described in the following
for “MaintenanceI” and “MaintenanceII.”
Generally, it is recommended that the rst service
be MaintenanceI, the second service be
MaintenanceII, and that you alternate
MaintenanceIand MaintenanceIIthereafter.
However, in some cases, MaintenanceIImay be
required more often.
MaintenanceI— Use MaintenanceIif the light
or message comes on within 10 months since
the vehicle was purchased or MaintenanceII
was performed.
MaintenanceII— Use MaintenanceIIif the
previous service performed was MaintenanceI.
Always use MaintenanceIIwhenever the light
or message comes on 10 months or more since
the last service or if the light or message has
not come on at all for one year.
462

Scheduled Maintenance
Service MaintenanceIMaintenanceII
Change engine oil and lter. SeeEngine Oil on page 353. Reset oil life system.
SeeEngine Oil Life System on page 356.An Emission Control Service.••
Visually check for any leaks or damage.See footnote (k).••
Inspect engine air cleaner lter. If necessary, replace lter. SeeEngine Air
Cleaner/Filter on page 358.See footnote (l).•
Rotate tires and check ination pressures and wear. SeeTire Inspection and
Rotation on page 416and “Tire Wear Inspection” inAt Least Once a Month
on page 467.••
Inspect brake system.See footnote (a).••
Check engine coolant and windshield washer uid levels and add uid
as needed.••
Perform any needed additional services. See “Additional Required Services”
in this section.••
Inspect suspension and steering components.See footnote (b).•
Inspect engine cooling system.See footnote (c).•
Inspect wiper blades.See footnote (d).•
Inspect restraint system components.See footnote (e).•
Lubricate body components.See footnote (f).•
Check transaxle uid level and add uid as needed.•
Replace passenger compartment air lter.See footnote (g).•
Inspect throttle system.See footnote (j).•
463

(h)Change automatic transaxle uid and lter if
the vehicle is mainly driven under one or more of
these conditions:
In heavy city traffic where the outside
temperature regularly reaches 90°F (32°C)
or higher.
In hilly or mountainous terrain.
When doing frequent trailer towing.
Uses such as found in taxi, police, or
delivery service.
(i)Drain, ush, and rell cooling system. This
service can be complex; you should have
your dealer perform this service. See Engine
Coolant on page 363 for what to use. Inspect
hoses. Clean radiator, condenser, pressure cap,
and ller neck. Pressure test the cooling
system and pressure cap.
(j)Check throttle system for interference or
binding and for damaged or missing parts. Replace
parts as needed. Replace any components that
have high effort or excessive wear. Do not
lubricate accelerator or cruise control cables.(k)A uid loss in any vehicle system could
indicate a problem. Have the system inspected
and repaired and the uid level checked. Add uid
if needed.
(l)If you drive regularly under dusty conditions,
inspect the lter at each engine oil change.
(m)Visually inspect belt for fraying, excessive
cracks, or obvious damage. Replace belt if
necessary.
Owner Checks and Services
These owner checks and services should be
performed at the intervals specied to help
ensure the safety, dependability, and emission
control performance of your vehicle. Your
GM Goodwrench
®dealer can assist you with
these checks and services.
Be sure any necessary repairs are completed at
once. Whenever any uids or lubricants are added
to your vehicle, make sure they are the proper
ones, as shown inRecommended Fluids and
Lubricants on page 470.
466

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