2005 BUICK LACROSSE brake light

The brake system warning light will also appear on the
instrument panel cluster when this message appears
on the DIC. SeeBrake System Warning Light on
page 3-36.
This message will display and a chime will sound only
while the ignition is in RUN. Press any of the DIC
buttons to acknowledge this message and to clear it
from the screen.
This message will continue to display for two seconds if
it has not been acknowledged when the engine is
turned off. It will also re-display for two seconds if the
message has been acknowledged, but the condition still
exists when the engine is turned off.
If the condition still exists, the message will re-appear
when the engine is turned on.
LOW FUEL
This message will display when your vehicle is low on
fuel. You should rell the tank as soon as possible. See
Fuel Gage on page 3-46andFilling the Tank on
page 5-8for more information.
The message will display and a chime will sound while
the ignition is in RUN. Press any of the DIC buttons
to acknowledge this message and to clear it from
the screen.
If the condition still exists, the message will re-appear
when the engine is turned on.
LOW OIL LEVEL
This message will display when the vehicle’s engine oil
is low. Fill the oil to the proper level as soon as
possible. SeeEngine Compartment Overview on
page 5-12for the engine oil ll location. Also, see
Engine Oil on page 5-15for information on the kind of
oil to use and the proper oil level.
The message will display and a chime will sound while
the ignition is in RUN. Press any of the DIC buttons
to acknowledge this message and to clear it from
the screen.
This message will continue to display for two seconds if
it has not been acknowledged when the engine is
turned off. It will also re-display for two seconds if the
message has been acknowledged, but the condition still
exists when the engine is turned off.
If the condition still exists, the message will re-appear
when the engine is turned on.
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PARKING BRAKE ON
This message will display to alert the driver when the
vehicle’s parking brake is on, the ignition is in RUN, and
the vehicle speed is greater than 5 mph (8 km/h).
Release the parking brake before driving. SeeParking
Brake on page 2-27for more information.
The brake light will also appear on the instrument panel
cluster when this message appears on the DIC. See
Brake System Warning Light on page 3-36.
A chime will sound continuously while this message is
displayed if driving above 5 mph (8 km/h). Press
any of the DIC buttons to acknowledge this message
and to clear it from the screen.
This message will continue to display for two seconds if
it has not been acknowledged when the engine is
turned off. It will also re-display for two seconds if the
message has been acknowledged, but the condition still
exists when the engine is turned off.
If the condition still exists, the message will re-appear
when the engine is turned on.
PARK LAMPS ON
This message will display to alert the driver when the
headlamps or parking lamps are on while the ignition is
off and the driver’s door is opened. SeeExterior
Lamps on page 3-13for more information.
A chime will sound continuously while this message is
displayed. Press any of the DIC buttons to acknowledge
this message and to clear it from the screen.
PASSENGER’S DOOR AJAR
This message will display when the front passenger’s
door is not closed properly. When this message
appears, you should make sure that the front
passenger’s door is closed completely.
This message will display while the ignition is in RUN. A
chime will sound when the ignition is shifted out of
PARK (P). Press any of the DIC buttons to acknowledge
this message and to clear it from the screen.
This message will continue to display for two seconds if
it has not been acknowledged when the engine is
turned off. It will also re-display for two seconds if the
message has been acknowledged, but the condition still
exists when the engine is turned off.
If the condition still exists, the message will re-appear
when the engine is turned on.
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RIGHT FRONT TURN LAMP OUT
This message will display when the right front turn
signal bulb needs to be replaced. SeeFront Turn Signal
and Parking Lamps on page 5-47.
This message will display while the ignition is in RUN.
Press any of the DIC buttons to acknowledge this
message and to clear it from the screen.
This message will continue to display for two seconds if
it has not been acknowledged when the engine is
turned off. It will also re-display for two seconds if the
message has been acknowledged, but the condition still
exists when the engine is turned off.
If the condition still exists, the message will re-appear
when the engine is turned on.
RIGHT REAR TURN LAMP OUT
This message will display when the right rear turn signal
bulb needs to be replaced. SeeTaillamps, Turn
Signal, Sidemarker, Stoplamps and Back-up Lamps on
page 5-48.
This message will display while the ignition is in RUN.
Press any of the DIC buttons to acknowledge this
message and to clear it from the screen.This message will continue to display for two seconds if
it has not been acknowledged when the engine is
turned off. It will also re-display for two seconds if the
message has been acknowledged, but the condition still
exists when the engine is turned off.
If the condition still exists, the message will re-appear
when the engine is turned on.
SERVICE ABS SYSTEM
If the vehicle has the Anti-Lock Brake System (ABS),
this message will display when the system is not
functioning properly. Have the brake system serviced by
your GM dealer as soon as possible.
The anti-lock brake system warning light will also
appear on the instrument panel cluster when this
message appears on the DIC. SeeAnti-Lock Brake
System Warning Light on page 3-37.
This message will only display while the ignition is in
RUN. Press any of the DIC buttons to acknowledge this
message and to clear it from the screen.
This message will continue to display for two seconds if
it has not been acknowledged when the engine is
turned off. It will also re-display for two seconds if the
message has been acknowledged, but the condition still
exists when the engine is turned off.
If the condition still exists, the message will re-appear
when the engine is turned on.
3-65

SERVICE BRAKE APPLY SENSOR
This message will come on when the brake apply
sensor is not functioning properly. The vehicle still has
brakes when this warning message displays, but you
should have the vehicle serviced by your GM dealer as
soon as possible.
This message will display only while the ignition is in
RUN. A chime will sound for two seconds while this
message is displayed. Press any of the DIC buttons
to acknowledge this message and to clear it from
the screen.
This message will continue to display if it has not been
acknowledged when the engine is turned off. It will
also re-display for two seconds if the message has been
acknowledged, but the condition still exists when the
engine is turned off.
If the condition still exists, the message will re-appear
when the engine is turned on.
SERVICE BRAKE SYSTEM
This message will display when a problem with the
brake system has been detected. Have your vehicle
serviced by your GM dealer as soon as possible.
The brake system warning light will also appear on the
instrument panel cluster when this message appears
on the DIC. SeeBrake System Warning Light on
page 3-36.This message will only display while the ignition is in
RUN. Press any of the DIC buttons to acknowledge this
message and to clear it from the screen.
This message will continue to display for two seconds if
it has not been acknowledged when the engine is
turned off. It will also re-display for two seconds if the
message has been acknowledged, but the condition still
exists when the engine is turned off.
If the condition still exists, the message will re-appear
when the engine is turned on.
SERVICE PARK LAMPS
This message will display when there is a problem with
the park lamps. Check to see if the park lamp fuse
is blown and replace the fuse if necessary. SeeFuses
and Circuit Breakers on page 5-88andInstrument
Panel Fuse Block on page 5-88for more information. If
changing the fuse does not correct the problem, see
your GM dealer.
This message will only display while the ignition is in
RUN. Press any of the DIC buttons to acknowledge this
message and to clear it from the screen.
This message will continue to display for two seconds if
it has not been acknowledged when the engine is
turned off. It will also re-display for two seconds if the
message has been acknowledged, but the condition still
exists when the engine is turned off.
If the condition still exists, the message will re-appear
when the engine is turned on.
3-66

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. Your brakes may not have time to cool
between hard stops. Your brakes will wear out much
faster if you do a lot of heavy braking. If you keep pace
with the traffic and allow realistic following distances,
you will eliminate a lot of unnecessary braking.
That means better braking and longer brake life.
If your engine ever stops while you are driving, brake
normally but do not pump your brakes. If you do,
the pedal may get harder to push down. If your engine
stops, you will still have some power brake assist.
But you will use it when you brake. Once the power
assist is used up, it may take longer to stop and
the brake pedal will be harder to push.Anti-Lock Brake System (ABS)
Your vehicle may have anti-lock brakes. ABS is an
advanced electronic braking system that will help
prevent a braking skid.
If your vehicle has anti-lock
brakes, this warning light
on the instrument panel will
come on briey when
you start your vehicle.
When you start your engine, or when you begin to drive
away, your anti-lock brake system will check itself.
You may hear a momentary motor or clicking noise while
this test is going on, and you may even notice that
your brake pedal moves or pulses a little. This is normal.
4-6

Using Anti-Lock
Do not pump the brakes. Just hold the brake pedal
down rmly and let anti-lock work for you. You may feel
a slight brake pedal pulsation or notice some noise,
but this is normal.
Braking in Emergencies
At some time, nearly every driver gets into a situation
that requires hard braking.
If you have anti-lock brakes, you can steer and brake at
the same time. However, if you do not have anti-lock
brakes, your rst reaction — to hit the brake pedal hard
and hold it down — may be the wrong thing to do.
Your wheels can stop rolling. Once they do, the vehicle
cannot respond to your steering. Momentum will
carry it in whatever direction it was headed when the
wheels stopped rolling. That could be off the road, into
the very thing you were trying to avoid, or into traffic.
If you do not have anti-lock brakes, use a “squeeze”
braking technique. This will give you maximum braking
while maintaining steering control. You can do this
by pushing on the brake pedal with steadily
increasing pressure.
In an emergency, you will probably want to squeeze the
brakes hard without locking the wheels. If you hear or
feel the wheels sliding, ease off the brake pedal.This will help you retain steering control. If you do have
anti-lock brakes, it is different. SeeAnti-Lock Brake
System (ABS) on page 4-6.
In many emergencies, steering can help you more than
even the very best braking.
Traction Control System (TCS)
Your vehicle may have a Traction Control System (TCS)
that limits wheel spin. This is especially useful in
slippery road conditions. The system operates only if it
senses that one or both of the front wheels are
spinning or beginning to lose traction. When this
happens, the system reduces engine power and may
also upshift the transaxle to limit wheel spin.
The traction control system
active light will come on
while the TCS is limiting
wheel spin.
If your vehicle has a Driver Information Center (DIC),
the TRACTION CONTROL ACTIVE message will come
on in the while the TCS is limiting wheel spin.
4-8

You may feel or hear the system working, but this is
normal.
If the vehicle is in cruise control when the TCS begins
to limit wheel spin, the cruise control will automatically
disengage. When road conditions allow safe use of
the cruise control, it can be used again. SeeCruise
Control on page 3-10.
The TCS operates in all transaxle shift lever positions.
But the system can upshift the transaxle only as high as
the shift lever position that was chosen, so use the
lower gears only when necessary. SeeAutomatic
Transaxle Operation on page 2-24.
To limit wheel spin, especially in slippery road
conditions, you should always leave the TCS on. But
you can turn the system off if you ever need to. The TCS
should be turned off if the vehicle ever gets stuck in
sand, mud or snow and rocking the vehicle is required.
SeeRocking Your Vehicle to Get It Out on page 4-28
andIf Your Vehicle is Stuck in Sand, Mud, Ice or Snow
on page 4-28.
To turn the TCS on or off, press the TCS button located
directly behind the gear shift lever. If your vehicle has
a DIC, the TCS button is located above the radio.
When the TCS is turned off, the TCS warning light will
come on. It will disappear when the TCS is turned
back on. If the TCS is limiting wheel spin when the TCS
button is pressed, the TCS warning light will come on
and the TCS will turn off right away.StabiliTrak®System
Your vehicle may be equipped with a vehicle stability
enhancement system called StabiliTrak®.Itisan
advanced computer controlled system that assists you
with directional control of the vehicle in difficult
driving conditions.
StabiliTrak
®activates when the computer senses a
discrepancy between your intended path and the
direction the vehicle is actually traveling. StabiliTrak
®
selectively applies braking pressure at any one of
the vehicle’s brakes to help steer the vehicle in the
direction which you are steering.
When the system activates, a STABILITY CONTROL
ACTIVE message will be displayed on the Driver
Information Center (DIC). SeeDIC Warnings and
Messages on page 3-53. You may also hear a noise or
feel vibration in the brake pedal. This is normal. Continue
to steer the vehicle in the direction you want it to go.
If there is a problem detected with StabiliTrak
®,a
SERVICE STABILITY SYSTEM message will be
displayed on the Driver Information Center (DIC). See
DIC Warnings and Messages on page 3-53. When
this message is displayed, the system is not operational.
Driving should be adjusted accordingly.
If your vehicle is in cruise control when the StabiliTrak
®
activates, the cruise control will automatically
disengage. When road conditions allow you to safely
use it again, you may reengage the cruise control. See
Cruise Control on page 3-10for more information.
4-9

The heavier the rain, the harder it is to see. Even if your
windshield wiper blades are in good shape, a heavy
rain can make it harder to see road signs and
traffic signals, pavement markings, the edge of the road,
and even people walking.
It is wise to keep your windshield wiping equipment in
good shape and keep your windshield washer tank lled
with washer uid. Replace your windshield wiper
inserts when they show signs of streaking or missing
areas on the windshield, or when strips of rubber start to
separate from the inserts.
Driving too fast through large water puddles or even
going through some car washes can cause problems,
too. The water may affect your brakes. Try to avoid
puddles. But if you cannot, try to slow down before
you hit them.
{CAUTION:
Wet brakes can cause accidents. They will not
work as well in a quick stop and may cause
pulling to one side. You could lose control of
the vehicle.
After driving through a large puddle of water
or a car wash, apply your brake pedal lightly
until your brakes work normally.
4-17