maintenance BUICK LACROSSE 2007 Owner's Manual

Windshield Replacement
....................... 401
Windshield Wiper Blade Replacement
... 401
Tires
..................................................... 402
Appearance Care
.................................. 438
Vehicle Identication
............................. 448
Electrical System
.................................. 449
Capacities and Specications
................ 454Maintenance Schedule
.............................. 457
Maintenance Schedule
.......................... 458
Customer Assistance Information
............. 477
Customer Assistance and Information
... 478
Reporting Safety Defects
...................... 494
Index
.......................................................... 497
2

Servicing Your Airbag-Equipped
Vehicle
Airbags affect how your vehicle should be
serviced. There are parts of the airbag system in
several places around your vehicle. You do
not want the system to inate while someone is
working on your vehicle. Your dealer and the
service manual have information about servicing
your vehicle and the airbag system. To purchase a
service manual, seeService Publications
Ordering Information on page 495.
{CAUTION:
For up to 10 seconds, after the ignition is
turned off and the battery is disconnected,
an airbag can still inate during improper
service. You can be injured if you are
close to an airbag when it inates. Avoid
yellow connectors. They are probably part
of the airbag system. Be sure to follow
proper service procedures, and make sure
the person performing work for you is
qualied to do so.
The airbag system does not need regular
maintenance.
80

Restraint System Check
Checking the 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. SeeCare of Safety Belts on page 442
for more information.
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 airbag covers,
and have them repaired or replaced. The airbag
system does not need regular maintenance.
Notice:If you damage the covering for the
driver’s or the right front passenger’s airbag, or
the side impact airbag covering (if equipped) on
the ceiling near the side windows, the airbag
may not work properly. You may have to replace
the airbag module in the steering wheel, both
the airbag module and the instrument panel for
the right front passenger’s airbag, or side
impact airbag module and ceiling covering for
roof-mounted side impact airbags (if equipped.)
Do not open or break the airbag coverings.
82

This control has four types of operation.
Automatic can set/change the temperature
only. AUTO and temperature only will
appear on the display.
Semi-Automatic Fan can set/change the
temperature and mode. The fan operates
automatically. The temperature and mode will
appear on the display.
Semi-Automatic Mode can set/change the
temperature and fan speed. The mode
operates automatically. The fan speed and
temperature will appear on the display.
Manual can set/change the temperature,
mode and fan. The fan speed, temperature,
and mode will appear on the display.
If your vehicle has the remote start feature, the
climate control system will automatically regulate
the inside temperature of your vehicle when
the remote start system is activated. Normal
operation and the last setting of the climate control
system will return after the key is turned on.
Manual Operation
During daylight hours, the instrument panel
brightness control might need to be adjusted to
the highest setting, in order to see the indicator
lights for the various climate control settings.
OFF:Press this button to turn the climate control
system off.
yz(Temperature):Press these buttons to
manually adjust the temperature inside the vehicle.
Press the up arrow on the driver or passenger
side to raise the temperature, and press the down
arrow to lower the temperature. The display will
show the selected temperature.
z9(Fan):Press this button to decrease the fan
speed. Pressing the arrows cancels the automatic
operation and places the system in manual or
semi-automatic mode. Press the AUTO button to
return to automatic operation. If the airow seems
low when the fan is at the highest setting, the
passenger compartment air lter may need to be
replaced. For more information seePassenger
Compartment Air Filter on page 178andScheduled
Maintenance on page 462.
174

9y(Fan):Press this button to increase the fan
speed. Pressing the arrows cancels the automatic
operation and places the system in manual or
semi-automatic mode. Press the AUTO button to
return to automatic operation. If the airow
seems low when the fan is at the highest setting,
the passenger compartment air lter may need
to be replaced. For more information see
Passenger Compartment Air Filter on page 178
andScheduled Maintenance on page 462.
6(Floor):This mode directs most of the air to
the oor, with some air directed to the side window
outlets and a small amount to the windshield.
)(Bi-Level):This setting directs airow to the
instrument panel and oor outlets. A small amount
of air is also directed to the windshield and the
side window outlets.
Y(Vent):This mode directs air through the
instrument panel outlets.
h(Recirculation):Press this button to turn
recirculation mode on or off. This mode keeps
outside air from coming into the vehicle. It can be
used to help reduce the outside air and odors
that enter your vehicle or help cool the air inside
the vehicle quicker.
Recirculation is not available while in the oor,
defrost, or oor/defog modes. Using recirculation
for long periods of time may cause the air
inside your vehicle to become too dry.
Recirculation mode has a ve minute timer after
which the system allows for some fresh outside air
into the vehicle to maintain interior air quality.
#(Air Conditioning):Press this button to turn
the air conditioning compressor on and off.
The indicator light on the button will come on
when the air conditioning is on. The indicator light
will change with each button press even when
conditions prevent operation.
((Heated Seats):Press this button to turn the
driver or passenger heated seats on and off. See
Heated Seats on page 10for additional information.
175

Passenger Compartment Air Filter
The passenger compartment air lter is located in
the engine compartment below the air inlet
grille, near the passenger’s side windshield wiper
arm. SeeEngine Compartment Overview on
page 350.
The lter traps most of the pollen from the air
entering the air conditioning module. Like
the engine’s air cleaner lter, it needs to be
changed periodically to keep the air conditioning
working at its best. For information on how often to
change the passenger compartment air lter,
seeScheduled Maintenance on page 462.
To change the passenger compartment air lter,
use the following steps:
1. Turn the ignition to ACCESSORY and turn the
windshield wipers on.
2. Turn the ignition to OFF when the windshield
wipers are in the upright position.
3. Raise the hood.
4. Disconnect the windshield washer pump hose
from the fender rail and air inlet grille.5. Peel back the hood weather-strip from the
passenger’s side of the vehicle halfway to
the center of the hood.
6. Remove the three air inlet grille retainers.
7. Remove the air inlet grille.
8. Remove the water deector panel.
9. Remove the old air
lter by pulling up
on its tab.
178

10. Install a new passenger compartment air lter.
SeeNormal Maintenance Replacement Parts
on page 471for the type of lter to use.
Make sure it slides under the compartment
retainers.
11. Reverse Steps 1 through 8.
For best climate control performance,
re-installation of a clean air lter is required.
Warning Lights, Gages,
and Indicators
This part describes the warning lights and gages
that may be on the vehicle. The pictures will
help you locate them.
Warning lights and gages can signal that something
is wrong before it becomes serious enough to
cause an expensive repair or replacement. Paying
attention to the warning lights and gages could also
save you or others from injury.Warning lights come on when there may be or is a
problem with one of the vehicle’s functions. As
you will see in the details on the next few pages,
some warning lights come on briey when you
start the engine just to let you know they are
working. If you are familiar with this section, you
should not be alarmed when this happens.
Gages can indicate when there may be or is a
problem with one of your vehicle’s functions. Often
gages and warning lights work together to let
you know when there is a problem with your
vehicle.
When one of the warning lights comes on and
stays on when you are driving, or when one of the
gages shows there may be a problem, check
the section that tells you what to do about
it. Please follow this manual’s advice. Waiting to
do repairs can be costly – and even dangerous. So
please get to know the warning lights and gages.
They are a big help.
179

Notice:If you keep driving your vehicle
with this light on, after awhile, your emission
controls may not work as well, your fuel
economy may not be as good, and your engine
may not run as smoothly. This could lead to
costly repairs that may not be covered by
your warranty.
Notice:Modications made to the engine,
transaxle, exhaust, intake, or fuel system
of your vehicle or the replacement of the
original tires with other than those of the same
Tire Performance Criteria (TPC) can affect
your vehicle’s emission controls and may
cause this light to come on. Modications to
these systems could lead to costly repairs not
covered by your warranty. This may also
result in a failure to pass a required Emission
Inspection/Maintenance test. SeeAccessories
and Modifications on page 341.This light should come on, as a check to show
you it is working, when the ignition is on and the
engine is not running. If the light does not
come on, have it repaired. This light will also
come on during a malfunction in one of two ways:
Light Flashing— A misre condition has
been detected. A misre increases vehicle
emissions and may damage the emission
control system on your vehicle. Diagnosis and
service may be required.
Light On Steady— An emission control
system malfunction has been detected on your
vehicle. Diagnosis and service may be
required.
191

Have you recently changed brands of fuel?
If so, be sure to fuel your vehicle with quality fuel.
SeeGasoline Octane on page 343. Poor fuel
quality will cause your engine not to run as
efficiently as designed. You may notice this as
stalling after start-up, stalling when you put
the vehicle into gear, misring, hesitation on
acceleration, or stumbling on acceleration. (These
conditions may go away once the engine is
warmed up.) This will be detected by the system
and cause the light to turn on.
If you experience one or more of these conditions,
change the fuel brand you use. It will require at
least one full tank of the proper fuel to turn the
light off.
If none of the above steps have made the light
turn off, your dealer can check the vehicle.
Your dealer has the proper test equipment and
diagnostic tools to x any mechanical or electrical
problems that may have developed.Emissions Inspection and Maintenance
Programs
Some state/provincial and local governments have
or may begin programs to inspect the emission
control equipment on your vehicle. Failure to pass
this inspection could prevent you from getting a
vehicle registration.
Here are some things you need to know to help
your vehicle pass an inspection:
Your vehicle will not pass this inspection if the
check engine light is on or not working properly.
Your vehicle will not pass this inspection if
the OBD (on-board diagnostic) system determines
that critical emission control systems have not
been completely diagnosed by the system.
The vehicle would be considered not ready for
inspection. This can happen if you have recently
replaced your battery or if your battery has
run down. The diagnostic system is designed to
evaluate critical emission control systems
during normal driving. This may take several days
of routine driving. If you have done this and
your vehicle still does not pass the inspection for
lack of OBD system readiness, your dealer
can prepare the vehicle for inspection.
193

Oil Pressure Light
Your vehicle may have
this feature.
If the vehicle has an oil problem, this light may
stay on after the engine is started, or come
on while you are driving.
This light indicates that oil is not going through the
engine quickly enough to keep it lubricated. The
engine could be low on oil or could have some
other oil problem. Have it xed right away.
The oil light could also come on in the following
situations:
The light will come on briey when the ignition
is turned on to show that it is working properly.
If it does not come on with the ignition on,
there may be a problem with the fuse or bulb.
Have it xed right away.
Sometimes when the engine is idling at a
stop, a chime will sound and the light may
blink on and off. This is normal.
{CAUTION:
Do not keep driving if the oil pressure is
low. If you do, your engine can become so
hot that it catches re. You or others could
be burned. Check your oil as soon as
possible and have your vehicle serviced.
Notice:Lack of proper engine oil maintenance
may damage the engine. The repairs would
not be covered by your warranty. Always follow
the maintenance schedule in this manual for
changing engine oil.
194