2005 PONTIAC GRAND PRIX brake

{CAUTION:
Your brake system may not be working properly
if the brake system warning light is on. Driving
with the brake system warning light on can lead
to an accident. If the light is still on after you
have pulled off the road and stopped carefully,
have the vehicle towed for service.
Anti-Lock Brake System
Warning Light
If the vehicle has the
Anti-lock Brake System
(ABS), this light will come
on when the engine is
started and may stay on
for several seconds.
That is normal.If the ABS warning light comes on and stays on, there
may be a problem with the anti-lock portion of the brake
system. If the brake system warning light is not on,
the vehicle still has brakes, but it does not have anti-lock
brakes. SeeBrake System Warning Light on page 3-40.
If the light stays on, the vehicle needs service. If the
light comes on while the vehicle is being driven, stop as
soon as possible and turn the ignition off. Then start
the vehicle again to reset the system. If the light
still stays on, or comes on again while driving, the
vehicle needs service. If the regular brake system
warning light is not on, the vehicle still has brakes, but it
does not have anti-lock brakes. If the brake system
warning light is also on, the vehicle does not have
anti-lock brakes and there is a problem with the regular
brakes. SeeBrake System Warning Light on page 3-40.
If both the brake system warning light and the anti-lock
brake system light is on, pull off the road and have
the vehicle towed for service.
The anti-lock brake system warning light will come on
briey when the ignition key is turned to RUN. This
is normal. If the light does not come on then, have it
xed so it will be ready to warn you if there is a problem.
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Traction Control System (TCS)
Warning Light
If the vehicle has a 3800 supercharged V6 engine and
the Traction Control System (TCS), one of these
lights may come on for the following reasons:
The Traction Control button, located on the center
console, is pressed, turning the system off. The
light will stay on. To turn the system back on, press
the button again and the warning light should go
out. SeeTraction Control System (TCS) on
page 4-9for more information.
If there is a brake system problem that is specically
related to traction control, the TCS will turn off and
the warning light will come on.
If the brakes begin to overheat, the TCS will turn off
and the warning light will come on until the brakes
cool down.If the traction control system warning light comes on
and stays on for an extended period of time when the
system is turned on, the vehicle needs service.
Enhanced Traction System
Warning Light
If the vehicle has the 3800 V6 engine and the Enhanced
Traction System (ETS), one of these lights may come
on for the following reasons.
If the Traction Control button located on the center
console is pressed, turning the system off. This
light will come on and stay on. To turn the system
back on, press the button again and the warning
light should turn off. SeeEnhanced Traction
System (ETS) on page 4-10.
If the system is affected by an engine-related
problem, the system will turn off and the warning
light will come on.
3-42

Oil Pressure Light
If there is a problem with
the vehicle’s oil pressure,
this light may stay on
when the engine is started,
or it may come on while
the vehicle is being driven.
This 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 two other situations:
When the ignition is on but the engine is not
running, the light will come on as a test to indicate
it is working. The light will go out when the
ignition is turned to RUN. If it does not come on
while the ignition is in the on position, there may be
a problem with the fuse or bulb. SeeFuses and
Circuit Breakers on page 5-103.
If the brakes are applied quickly and the vehicle
makes a hard stop, the light may come on for a
moment. 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.
Fog Lamp Light
This light will come
on when the fog lamps
are in use.
The light will go out when the fog lamps are turned off.
SeeFog Lamps on page 3-16for more information.
3-47

CHECK GAS CAP
This warning message comes on when the gas cap is
not on, or is not fully tightened. Check the gas cap
to ensure it is on and properly tightened.
This message will display while the ignition is in RUN.
A chime will sound for two seconds when this message
is displayed and then the message continues to
display. Press the set/reset button to acknowledge this
message and to clear it from the screen.
This message will continue to display for three seconds
if it has not been acknowledged when the engine is
turned off. It will also re-display for three 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.
CHECK TIRE PRESSURE
This symbol comes on
with the CHECK TIRE
PRESSURE warning
message.
If the vehicle has ABS brakes, this warning message
will appear when the air pressure in one of the tires
is too low or too high. Check the vehicle’s tire pressure
as soon as possible, and ll or deate the affected
tire to the appropriate level. The correct tire ination
pressure should be set to those shown on the
tire-loading information label on the vehicle. See
Loading Your Vehicle on page 4-33for more information.
The CHECK TIRE PRESSURE screen is reset when
it is acknowledged. However, the TIRE INFLATION
MONITOR SYSTEM screen, located under the option
menu in the DIC, must also be reset. See “Tire Ination
Monitor System” in the options section underDIC
Controls and Displays (Base Level DIC) on page 3-49
orDIC Controls and Displays (Uplevel DIC with Trip
Computer) on page 3-57for more information.
3-72

LOW BRAKE FLUID
This symbol comes on with
the LOW BRAKE FLUID
warning message.
This warning message will appear when the brake uid
level is low. Fill the brake master cylinder to the proper
level. SeeEngine Compartment Overview on page 5-12
for the location of the brake master cylinder reservoir.
Also, seeBrakes on page 5-40for proper uid level.
The brake light will also appear on the instrument panel
cluster when this message appears on the DIC.
This message will display only while the ignition is in
RUN. A chime will sound for two seconds while
this message is displayed. Press the set/reset button
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 three seconds if the message has
been acknowledged, but the condition still exists
when the engine is turned off.If the condition exists, the message will re-appear when
the engine is turned on.LOW FUEL
This symbol comes on with
the LOW FUEL warning
message.
This warning message will appear when the vehicle is
low on fuel. Rell the fuel tank as soon as possible.
This message will display while the ignition is in RUN.
A chime will sound for two seconds when this message
is displayed. Press the set/reset button 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 three 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.
3-78

PARKING BRAKE ON
This symbol comes on with
the PARKING BRAKE ON
warning message.
This warning message appears 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). SeeParking Brake on page 2-30for
more information.
The brake light will also appear on the instrument panel
cluster when this message appears on the DIC.
A chime will sound continuously while this message
is displayed if driving above 5 mph (8 km/h). Press the
set/reset button to acknowledge this message and
to clear it from the screen.This message will continue to display for three seconds
if it has not been acknowledged when the engine is
turned off. It will also re-display for three 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 warning message will come on to alert the driver
when the parking lamps are on, the ignition is in
OFF, and the key is removed. A chime will sound
continuously while this message is displayed. This
message cannot be acknowledged.
READING LAMP ON
This warning message will come on to alert the driver
that the reading lamps are on and the ignition is in OFF.
A chime will sound for two seconds while this message
is displayed. This message cannot be acknowledged.
3-81

SERVICE ABS SYSTEM
This symbol comes on
with the SERVICE ABS
SYSTEM warning
message.
If the vehicle has the Anti-Lock Brake System (ABS),
this warning message will appear when the vehicle’s
brakes are not functioning properly. Have the brake
system 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 the set/reset button
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 three 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 symbol comes on with
the SERVICE BRAKE
SYSTEM warning
message.
This warning message will appear when the vehicle’s
brakes are not functioning properly. Have the brake
system 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 the set/reset button
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 three 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.
3-84

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 the set/reset button
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 three 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 warning message will come on if one of the
vehicle’s parking lamps needs to be replaced. SeeFront
Turn Signal, Parking and Fog Lamps on page 5-53for
bulb replacement procedures.
This message will display only while the ignition is in
RUN. A chime will sound for two seconds while
this message is displayed. Press the set/reset button
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 three 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.
3-85