2010 BUICK LACROSSE tires

2010 Buick LaCrosse Owner ManualM
Bulb Replacement . . . . . . . . . . . . 9-33
Electrical System . . . . . . . . . . . . . 9-38
Wheels and Tires . . . . . . . . . . . . . 9-46
Jump Starting . . . . . . . . . . . . . . . . 9-75
Towing . . . . . . . . . . . . . . . . . . . . . . . 9-79
Appearance Care . . . . . . . . . . . . . 9-82
Service and Maintenance . . . 10-1
General Information . . . . . . . . . . 10-1
Scheduled Maintenance . . . . . . 10-2
Recommended Fluids,
Lubricants, and Parts . . . . . . . 10-7
Maintenance Records . . . . . . . 10-10
Technical Data . . . . . . . . . . . . . . . 11-1
Vehicle Identification . . . . . . . . . . 11-1
Vehicle Data . . . . . . . . . . . . . . . . . . 11-2
Customer Information . . . . . . . 12-1
Customer Information . . . . . . . . 12-1
Reporting Safety Defects . . . . 12-13
Vehicle Data Recording and
Privacy . . . . . . . . . . . . . . . . . . . . 12-15
Index . . . . . . . . . . . . . . . . . . . . . i-1

4-18 Instruments and Controls
If the check engine light comes on
and stays on, while the engine is
running, this indicates that there is
an OBD II problem and service is
required.
Malfunctions often are indicated by
the system before any problem is
apparent. Being aware of the light
can prevent more serious damage
to the vehicle. This system assists
the service technician in correctly
diagnosing any malfunction.
Notice:If the vehicle is
continually driven with this light
on, after a while, the emission
controls might not work as well,
the vehicle's fuel economy might
not be as good, and the engine
might not run as smoothly. This
could lead to costly repairs that
might not be covered by the
vehicle warranty. Notice:
Modifications made to the
engine, transmission, exhaust,
intake, or fuel system of the
vehicle or the replacement of the
original tires with other than
those of the same Tire
Performance Criteria (TPC) can
affect the vehicle's emission
controls and can cause this light
to come on. Modifications to
these systems could lead to
costly repairs not covered by the
vehicle warranty. This could also
result in a failure to pass a
required Emission Inspection/
Maintenance test. See
Accessories and Modifications
on page 9‑3.
This light comes on during a
malfunction in one of two ways:
Light Flashing: A misfire condition
has been detected. A misfire
increases vehicle emissions and
could damage the emission control
system on the vehicle. Diagnosis
and service might be required. The following can prevent more
serious damage to the vehicle:
.Reduce vehicle speed.
.Avoid hard accelerations.
.Avoid steep uphill grades.
.If towing a trailer, reduce the
amount of cargo being hauled as
soon as it is possible.
If the light continues to flash, when
it is safe to do so, stop the vehicle.
Find a safe place to park the
vehicle. Turn the vehicle off, wait at
least 10 seconds, and restart the
engine. If the light is still flashing,
follow the previous steps and see
your dealer/retailer for service as
soon as possible.
Light On Steady: An emission
control system malfunction has
been detected on the vehicle.
Diagnosis and service might be
required.

Instruments and Controls 4-23
SeeTraction Control System (TCS)on page 8‑34andElectronic
Stability Control (ESC)on
page 8‑35for more information
Tire Pressure Light
For vehicles with a tire pressure
monitoring system, this light comes
on briefly when the engine is
started. It provides information
about tire pressures and the Tire
Pressure Monitoring System.
When the Light is On Steady
This indicates that one or more of
the tires are significantly
underinflated.
A tire pressure message in the
Driver Information Center (DIC), can
accompany the light. See Tire
Messages
on page 4‑37for more information. Stop and check the
tires as soon as it is safe to do so.
If underinflated, inflate to the proper
pressure. See
Tire Pressure
on
page 9‑53for more information.
When the Light Flashes First and
Then is On Steady
This indicates that there may be a
problem with the Tire Pressure
Monitor System. The light flashes
for about a minute and stays on
steady for the remainder of the
ignition cycle. This sequence
repeats with every ignition cycle.
See Tire Pressure Monitor
Operation
on page 9‑55for more
information.
Engine Oil Pressure Light
{WARNING
Do not keep driving if the oil
pressure is low. The engine can
become so hot that it catches fire.
(Continued)
WARNING (Continued)
Someone could be burned. Check
the oil as soon as possible and
have the vehicle serviced.
Notice: Lack of proper engine oil
maintenance can damage the
engine. The repairs would not be
covered by the vehicle warranty.
Always follow the maintenance
schedule in this manual for
changing engine oil.
The oil pressure light should come
on briefly as the engine is started.
If it does not come on have the
vehicle serviced by your dealer/
retailer.

4-28 Instruments and Controls
Unit
Move
w xto switch between
Metric or US when the Unit display
is active. Press SET to confirm the
setting. This will change the
displays on the cluster and DIC to
either metric or English (US)
measurements.
Tire Pressure
The display will show a vehicle with
the approximate pressures of all
four tires. Tire pressure is displayed
in either kilopascal (kPa) or pounds
per square inch (psi). See Tire
Pressure Monitor System
on
page 9‑54and Tire Pressure
Monitor Operationon page 9‑55for
more information.
Remaining Oil Life
This display shows an estimate of
the oil's remaining useful life.
If Remaining Oil Life 99% is
displayed, that means 99% of the
current oil life remains. When the remaining oil life is low,
the CHANGE ENGINE OIL SOON
message will appear on the display.
See
Engine Oil Messages
on
page 4‑35. The oil should changed
as soon as possible. See Engine Oil
on page 9‑11. In addition to the
engine oil life system monitoring the
oil life, additional maintenance is
recommended in the Maintenance
Schedule in this manual. See
Scheduled Maintenance
on
page 10‑2for more information.
Remember, the Oil Life display must
be reset after each oil change. It will
not reset itself. Also, be careful not
to reset the Oil Life display
accidentally at any time other than
when the oil has just been changed.
It cannot be reset accurately until
the next oil change. To reset the
engine oil life system press SET
while the Oil Life display is active.
See Engine Oil Life System
on
page 9‑13.
Compass
The vehicle may have a compass
display in the Driver Information
Center (DIC). See Compass
on
page 4‑8for more information.
Head-Up Display (HUD)
{WARNING
If the HUD image is too bright or
too high in your field of view, it
may take you more time to see
things you need to see when it is
dark outside. Be sure to keep the
HUD image dim and placed low in
your field of view.
For vehicles with the Head-Up
Display (HUD), some information
concerning the operation of the
vehicle is projected onto the
windshield. This includes the
speedometer reading, RPM reading,
transmission position, outside air
temperature, compass heading and
a brief display of the current radio

Instruments and Controls 4-37
Sport Mode On
This message displays when using
the selective ride control. See
Selective Ride Control
on
page 8‑36for more information.
Traction Control Off
This message displays when the
Traction Control System (TCS) is
turned off. Adjust your driving
accordingly.
Anti-Theft Alarm System
Messages
Theft Attempted
This message displays if the vehicle
detects a tamper condition.
Tire Messages
Check XXX Tire Pressure or
Add Air To Tire
This message displays if the vehicle
detects low pressure in one or more
tires. The tire with the low pressure
will be shown in the message.
Check the tire pressures.
Service Tire Monitor System
This message displays if there is a
problem with the Tire Pressure
Monitor System (TPMS). See Tire
Pressure Monitor Operation
on
page 9‑55for more information.
Tire Learning Active
This message displays when the
system is learning new tires. See
Tire Pressure Monitor Operation
on
page 9‑55for more information.
Transmission Messages
Service Transmission
This message displays if there is a
problem with the transmission. See
your dealer/retailer.
Shift To Park
This message displays when the
transmission needs to be shifted to
park. This may appear when
attempting to remove the key from
the ignition if the vehicle is not in
P (Park).
Transmission Hot –Idle
Engine
This message displays and a chime
sounds if the transmission fluid in
the vehicle gets hot. Driving with the
transmission fluid temperature high
can cause damage to the vehicle.
Stop the vehicle and let it idle to
allow the transmission to cool. This
message clears when the fluid
temperature reaches a safe level.

8-2 Driving and Operating
Towing
General TowingInformation . . . . . . . . . . . . . . . . . 8-54
Driving Characteristics and Towing Tips . . . . . . . . . . . . . . . . 8-54
Trailer Towing (2.4L L4
Engine) . . . . . . . . . . . . . . . . . . . . . 8-58
Trailer Towing (3.0L and 3.6L V6 Engines) . . . . . . . . . . . . . . . . 8-58
Towing Equipment . . . . . . . . . . . 8-59
Conversions and Add-Ons
Add-On Electrical Equipment . . . . . . . . . . . . . . . . . 8-60
Driving Information
Driving for Better Fuel
Economy
Driving habits can affect fuel
mileage. Here are some driving tips
to get the best fuel economy
possible.
.Avoid fast starts and accelerate
smoothly.
.Brake gradually and avoid
abrupt stops.
.Avoid idling the engine for long
periods of time.
.When road and weather
conditions are appropriate, use
cruise control, if equipped.
.Always follow posted speed
limits or drive more slowly when
conditions require.
.Keep vehicle tires properly
inflated.
.Combine several trips into a
single trip.
.Replace the vehicle's tires with
the same TPC Spec number
molded into the tire's sidewall
near the size.
.Follow recommended scheduled
maintenance.

8-4 Driving and Operating
Medical research shows that
alcohol in a person's system can
make crash injuries worse,
especially injuries to the brain,
spinal cord, or heart. This means
that when anyone who has been
drinking—driver or passenger —is
in a crash, that person's chance of
being killed or permanently disabled
is higher than if the person had not
been drinking.
Control of a Vehicle
The following three systems help to
control the vehicle while
driving —brakes, steering, and
accelerator. At times, as when
driving on snow or ice, it is easy to
ask more of those control systems
than the tires and road can provide.
Meaning, you can lose control of the
vehicle. See Traction Control
System (TCS) on page 8‑34.
Adding non-dealer/non-retailer
accessories can affect vehicle
performance. See Accessories and
Modifications on page 9‑3.
Braking
See Brake System Warning Lighton page 4‑20.
Braking action involves perception
time and reaction time. Deciding to
push the brake pedal is perception
time. Actually doing it is
reaction time.
Average reaction time is about
three-fourths of a second. But that is
only an average. It might be less
with one driver and as long as two
or three seconds or more with
another. Age, physical condition,
alertness, coordination, and
eyesight all play a part. So do
alcohol, drugs, and frustration. But
even in three-fourths of a second, a
vehicle moving at 100 km/h
(60 mph) travels 20 m (66 ft). That
could be a lot of distance in an
emergency, so keeping enough
space between the vehicle and
others is important. And, of course, actual stopping
distances vary greatly with the
surface of the road, whether it is
pavement or gravel; the condition of
the road, whether it is wet, dry,
or icy; tire tread; the condition of the
brakes; the weight of the vehicle;
and the amount of brake force
applied.
Avoid needless heavy braking.
Some people drive in
spurts
—heavy acceleration
followed by heavy braking —rather
than keeping pace with traffic. This
is a mistake. The brakes might not
have time to cool between hard
stops. The brakes will wear out
much faster with a lot of heavy
braking. Keeping pace with the
traffic and allowing realistic following
distances eliminates a lot of
unnecessary braking. That means
better braking and longer brake life.

Driving and Operating 8-5
If the engine ever stops while the
vehicle is being driven, brake
normally but do not pump the
brakes. If the brakes are pumped,
the pedal could get harder to push
down. If the engine stops, there will
still be some power brake assist but
it will be used when the brake is
applied. Once the power assist is
used up, it can take longer to stop
and the brake pedal will be harder
to push.
Adding non-dealer/non-retailer
accessories can affect vehicle
performance. SeeAccessories and
Modifications on page 9‑3.
Steering
Power Steering
If power steering assist is lost
because the engine stops or the
power steering system is not
functioning, the vehicle can be
steered but it will take more effort.
Speed Variable Assist Steering
The vehicle has a steering system
that varies the amount of effort
required to steer the vehicle in
relation to the speed of the vehicle.
The amount of steering effort
required is less at slower speeds to
make the vehicle more
maneuverable and easier to park. At
faster speeds, the steering effort
increases to provide a sport-like feel
to the steering. This provides
maximum control and stability.
If the vehicle seems harder to steer
than normal when parking or driving
slowly, there may be a problem with
the system. You will still have power
steering, but steering will be stiffer
than normal at slow speeds. See
your dealer/retailer for service.
Steering Tips
It is important to take curves at a
reasonable speed.
Traction in a curve depends on the
condition of the tires and the road
surface, the angle at which the
curve is banked, and vehicle speed.
While in a curve, speed is the one
factor that can be controlled.
If there is a need to reduce speed,
do it before entering the curve, while
the front wheels are straight.
Try to adjust the speed so you can
drive through the curve. Maintain a
reasonable, steady speed. Wait to
accelerate until out of the curve, and
then accelerate gently into the
straightaway.