2003 Oldsmobile Bravada engine

If the light comes on while you are driving, pull off the
road and stop carefully. You may notice that the pedal is
harder to push. Or, the pedal may go closer to the
floor. It may take longer to stop. If the light is still on,
have the vehicle towed for service. See
Towing
Your Vehicle
on page 4-41.
. ,UT brake sl ,,em m,, not be WOL ... ng
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’ve pulled
off the road and stopped
carefully, have the vehicle towed for service.
I
Anti-Lock Brake System Warning
Light
With the anti-lock brake
system, this light will come
on when you start your
engine and may stay on for
several seconds. That’s
normal.
A chime may also
sound when the light
comes on.
If the light stays on, or comes on when you’re driving,
your vehicle needs service. If the regular brake
system warning light isn’t on, you still have brakes, but
you don’t have anti-lock brakes. If the regular brake
system warning light is also on, you don’t have anti-lock
brakes and there’s a problem with your regular
brakes. See
Brake System Warning Light on page 3-33
earlier in this section.
The anti-lock brake system warning light should come
on briefly when you turn the ignition key to
RUN. If
the light doesn’t come on then, have it fixed
so it will be
ready to warn you
if there is a problem.
3-34

Engine Coolant Temperature Gage
L
United States
Malfunction Indicator Lamp
Service Engine Soon Light in the
United States
or Check Engine Light in
Canada
I SERVICE
II
- 'I
Canada
This gage shows the engine coolant temperature. If the
gage pointer moves into the red area, the engine
coolant has overheated.
If you have been operating your vehicle under normal
driving conditions, you should pull
off the road, stop your
vehicle and turn
off the engine as soon as possible.
See
Engine Overheating on page 5-24.
ENGINE
SOON
United States
CHECK
Canada
Your vehicle is equipped with a computer which
monitors operation
of the fuel, ignition and emission
control systems.
3-35

This system is called OBD II (On-Board
Diagnostics-Second Generation) and is intended
to
assure that emissions are at acceptable levels for the
life of the vehicle, helping to produce a cleaner
environment. The SERVICE ENGINE SOON or CHECK
ENGINE light comes on and a chime will sound
to
indicate that there is a problem and service is required. Malfunctions often will be indicated by the system
before any problem is apparent. This may prevent more
serious damage
to your vehicle. This system is also
designed to assist your service technician in correctly
diagnosing any malfunction.
Notice: If you keep driving your vehicle with this
light on, after a while, 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: Modifications made to the engine,
transmission, 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.
Modifications 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.
3-36
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 doesn’t come on, have it
repaired. This light will also come on during a
malfunction in one of two ways:
0 Light Flashing - A misfire condition has been
detected. A misfire increases vehicle emissions
and may damage the emission control system on
your vehicle. Dealer or qualified service center
diagnosis and service may be required.
Light On Steady - An emission control system
malfunction has been detected on your vehicle.
Dealer or qualified service center diagnosis
and service may be required.
If the Light Is Flashing
The following may prevent more serious damage to
your vehicle:
Reducing vehicle speed.
Avoiding hard accelerations.
Avoiding steep uphill grades.
If you are towing a trailer, reduce the amount of
cargo being hauled as soon as it is possible.
If the light stops flashing and remains on steady, see “If
the Light Is On Steady’’ following.

If the light continues to flash, when it is safe to do so,
stop the vehicle. Find a safe place to park your vehicle.
Turn the key off, wait at least
10 seconds and restart
the engine. If the light remains on steady, see “If
the Light
Is On Steady” following. If the light is still
flashing, follow the previous steps, and drive the vehicle
to your dealer or qualified service center for service.
If the Light Is On Steady
You may be able to correct the emission system
malfunction by considering the following:
Did you recently put fuel into your vehicle?
If
so, reinstall the fuel cap, making sure to fully install
the cap. See
Filling Your Tank on page 5-7. The
diagnostic system can determine
if the fuel cap has
been left
off or improperly installed. A loose or missing
fuel cap will allow fuel to evaporate into the atmosphere.
A few driving trips with the cap properly installed
should turn the light
off.
Did you just drive through a deep puddle of water? Have
you recently changed brands of fuel?
If
so, be sure to fuel your vehicle with quality fuel. See
Gasoline Octane on page 5-5. 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, misfiring, 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,
have your dealer or qualified service center check
the vehicle. Your dealer has the proper test equipment
and diagnostic tools to
fix any mechanical or electrical
problems that may have developed.
If
so, your electrical system may be wet. The condition
will usually be corrected when the electrical system
dries out.
A few driving trips should turn the light off.
3-37

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 SERVICE
ENGINE SOON or 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, see your dealer or qualified service
center to prepare the vehicle for inspection.
Oil Pressure Gage
United States Canada
The oil pressure gage shows the engine oil pressure in
psi (pounds per square inch) when the engine is
running. Canadian vehicles indicate pressure in kPa
(kilopascals).
Oil pressure may vary with engine speed, outside
temperature and oil viscosity, but readings above the
low pressure zone indicate the normal operating range.
A reading in the low pressure zone may be caused
by a dangerously low oil level or other problems causing
low oil pressure.
3-38

Don’t keep driving if the oil pressure is low. If
you do, your engine can become so hot that it
catches fire. You or others could be burned.
Check your oil as
soon as possible and have
your vehicle serviced.
Notice: Damage to your engine from neglected oil
problems can be costly and is not covered by
your warranty.
Change Engine Oil Light
CHANGE ENG
I OIL
United States Canada
This light is displayed when the engine oil needs to be
changed. Once the engine oil has been changed, the CHANGE
ENG OIL light
must be reset. Until it is reset, the light will
be displayed when the engine is on.
Security Light
United States Canada
This light will come on briefly when you turn the key
toward START. The light will stay on until the engine
starts.
If the light flashes, the Passlock@ system has entered a
tamper mode. If the vehicle fails to start, see
Passlock@
on page
2- 1 7.
If the light comes on continuously while driving and
stays on, there may be a problem with the Passlock@
system. Your vehicle will not be protected by Passlock@
,
and you should see your dealer.
Also, see
Content Theft-Deterrent on page 2- 16 for
additional information regarding the SECURITY light.
3-39

Cruise Control Light
CRUISE
'L
United States Canada
Your vehicle may have this feature. The CRUISE light
appears whenever you set your cruise control.
Reduced Engine
REDUCED
ENGINE
POWER
United States
Power Light
Canada
This light is displayed when a noticeable reduction in
the vehicle's performance may occur. The vehicle may
be driven at a reduced speed when the reduced
engine power light is on but acceleration and speed
may be reduced. The performance may be reduced until
the next time you drive your vehicle. If this light stays
on, see your dealer as soon as possible for diagnosis
and repair.
This light may also come on
if there is a problem with
the Electronic Throttle Control (ETC) system. If this
happens, take the vehicle in for service as soon
as possible.
3-40

Service All-Wheel Drive Light
S IC
AWD
United States Canada
This light should come on briefly when you turn on the
ignition, as a check to show you
it is working.
The SERVICE AWD light comes on
to indicate that
there may be a problem with the drive system and
service is required. Malfunctions can be indicated by the
system before any problem is apparent, which may
prevent serious damage
to the vehicle. This system is
also designed
to assist your service technician in
correctly diagnosing a malfunction.
Check Gages Warning Light
CHECK
GAGES
1 United States J
Canada
The CHECK GAGES light will come on briefly when you
are starting the engine.
If the light comes on and stays on while you are driving,
check your coolant temperature and engine oil pressure gages
to see if they are in the warning zones.
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