engine PONTIAC GRAND PRIX 2003 Owner's Manual

Cruise Control
With cruise control, you can maintain a speed of about
25 mph (40 km/h) or more without keeping your foot
on the accelerator. This can really help on long
trips. Cruise control does not work at speeds below
approximately
25 mph (40 km/h).
When you apply the brakes, the cruise control
shuts
off.
If your vehicle is in cruise control when the traction
control system on the
3800 Supercharged V6 engine or
the enhanced traction system on the 3100 V6 and
3800 V6 engine begins to limit wheel spin, the cruise
control will automatically disengage. See Traction
Control System (TCS) on page
4- 10 or Enhanced
Traction System (ETS) on page
4-1 1. When road
conditions allow you to safely use it again, you may
turn the cruise control back on.
Setting Cruise Control
Cruise control can be dangerous where
you can’t drive safely at a steady speed.
So, don’t use you’r cruise control on
winding roads or in heavy traffic.
Cruise control can be dangerous on
slippery roads. On such roads, fast
changes
in tire traction can cause
needless wheel spinning, and you could
lose control. Don’t use cruise control on
slippery roads.
I
If you leave your cruise control on when you’re
not using cruise, you might hit a button and go
into cruise when you don’t want to. You could
be startled and even lose control. Keep the
cruise control switch off until you want to use
cruise control.
1. Move the cruise control switch to ON.
2. Get up to the speed you want.
3. Push in the SET button at the end of the
4. Take your foot off the accelerator pedal.
multifunction lever
and release it.
3-8

The HUD also shows the following lights when they are
lit on the instrument panel cluster:
Turn Signal Indicators
High-Beam Indicator Symbol
Low Fuel Symbol
The HUD will display CHECK GAGES when the
following items are lit on the instrument panel cluster:
Oil Warning Symbol
Coolant Temperature Symbol
Charging System Symbol
When the ignition key is turned to RUN, the entire HUD
image will come on. Then the Head-Up Display will
operate normally.
Notice: Although the HUD image appears to be
near the front
of the vehicle, do not use it as
a parking aid. The
HUD was not designed for that
purpose.
If you try to use it as such, you may
misjudge the distance and damage your vehicle.
When the HUD is on, the speedometer reading will be
displayed continually. The current radio station
or
CD track number will only be displayed for three
seconds after the radio or CD track status changes.
This will happen whenever one of the radio controls is
pressed, either on the radio itself or on the optional
steering wheel controls. To
adjust the HUD
so you can see it properly do the
following:
1. Adjust your seat, if necessary, to a comfortable
position.
2. Start the engine and adjust the HUD controls
located on the instrument panel, to the right
of
the steering wheel. Move the DIM thumbwheel up
or down to adjust brightness.
3-1 6

A/C (Air Conditioning): Press this button to turn the
air-conditioning system on or
off. When A/C is pressed,
an indicator light above the button will come on to let
you know that
A/C is active. The instrument brightness
control may have to be adjusted to
the highest setting
during the daytime in order to see the indicator light.
On hot days, open the windows to let hot inside
air escape; then close them. This helps to reduce the
time it takes for your vehicle to cool down. It also helps
the system to operate more efficiently.
For quick cool down
on hot days:
1. Select the MAX recirculation mode.
2. Select A/C.
3. Select the coolest temperature.
4. Select the highest fan speed.
Using these settings together for long periods of time
may cause the air inside your vehicle to become too dry.
To prevent this from happening, after the air in your
vehicle has cooled, change the mode from MAX
to another mode such as bi-level.
The air-conditioning system removes moisture from the
air,
so you may sometimes notice a small amount of
water dripping underneath your vehicle while idling
or after turning
off the engine. This is normal.
Defogging and Defrosting
There are two modes to clear fog from your windshield.
Use the floor/defog mode
to clear the windows of fog
or moisture and warm the passengers. Use the defrost
mode to remove fog or frost from the windshield
more quickly.
Turn the mode knob to select the defog or defrost mode.
,2 (Floor/Defog): This mode directs the air equally
between the windshield and the floor outlets. When you
select this mode, the system turns on the
air-conditioning compressor unless the outside
temperature is at or below freezing.
9 FRONT (Defrost): Pressing FRONT directs most
of the air to the windshield and the side window
outlets, with some air directed to the floor outlets. In this
mode, the system will automatically run the
air-conditioning compressor, unless the outside
temperature is at or below freezing.
3-21

Rear Window Defogger
The rear window defogger uses a warming grid to
remove fog or frost from the rear window.
The rear window defogger will only work when the
ignition is in
RUN.
REAR: Press this button to turn the rear window
defogger on or
off. When this button is pressed an
indicator light above the button will come on to show that
the rear window defogger is active. The instrument
brightness control may have to be adjusted to the
highest setting during the daytime in order to see the
indicator light.
Be sure to clear as much snow from the rear window
as possible.
The rear window defogger will turn
off approximately
15 minutes after the button is pressed. If turned on
again, the defogger will only run for approximately seven
and one-half minutes before turning
off. The defogger
can also be turned
off by pressing the button again or by
turning
off the engine.
Notice: Don’t use a razor blade or something else
sharp on the inside of the rear window.
If you
do, you could cut or damage the defogger and the
repairs would not be covered by your warranty.
Do not attach a temporary vehicle license, tape, a
decal or anything similar to the defogger grid.
3-22
Outlet Adjustment
Use the controls located in the center of each outlet to
change the direction
of the airflow.
Operation Tips
e
e
Clear away any ice, snow or leaves from the air
inlets at the base of the windshield that may
block the flow of air into your vehicle.
Use of non-GM approved hood deflectors
may
adversely affect the performance of the system.
Keep the path under the front seats clear of objects
to help circulate the air inside
of your vehicle more
effectively.

Warning Lights, Gages and
Indicators
This part describes the warning lights and gages
that
may be on your 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
your 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 your vehicle’s functions.
As you will
see in the details on the next few pages, some
warning lights come
on briefly when you start the
engine just to let you know they’re 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’s 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 your warning lights
and gages. They’re a big help.
Your vehicle may also have a Driver Information
Center (DIC) that works along with the warning lights
and gages. See Driver Information Center (DIC)
on page 3-38.
3-23

Your vehicle is equipped with this cluster or one very
similar to it. It includes indicator warning lights and
gages that are explained on the following pages.
Be sure to read about them.
Speedometer and Odometer
The speedometer lets you see your speed in both miles
per hour (mph) and kilometers per hour (km/h). The
odometer shows how far the vehicle has been driven in
either miles (used in the United States) or in kilometers
(used in Canada).
The vehicle has a tamper-resistant odometer.
If you see
silver lines between the numbers, you’ll know someone
has probably tampered with
it and the numbers may
not be correct.
You may wonder what happens
if the vehicle needs a
new odometer installed.
If the new one can be set to the
mileage total of the old odometer, then that will be
done.
If it can’t, then it will be set at zero and a label
must be put on the driver’s door to show the old mileage
reading when the new odometer was installed.
Trip Odometer
The trip odometer tells how far you have driven since
you last reset it.
To set it to zero, press the reset button
located to the right of the instrument panel cluster.
Tachometer
The tachometer displays the engine speed in thousands
of revolutions per minute (rpm).
Notice: Do not operate the engine with the
tachometer in the shaded warning area, or engine
damage may occur.
3-25

Anti-Lock Brake System Warning Light
if your vehicle has the
optional anti-lock brake
system, this light will come
on when your engine is
started and may stay on
for several seconds.
That’s normal.
If the anti-lock brake system warning light stays on
longer than normal after you’ve started your engine, turn
the ignition
off. If the light comes on and stays on
while you’re driving, stop as soon as possible and turn
the ignition
off. Then start the engine again to reset
the system.
If the light still stays on, or comes on again
while you’re driving, your vehicle needs service.
If
the light is on and the regular brake system warning
light isn’t on, you still have brakes, but you don’t have
anti-lock brakes.
The anti-lock brake system warning light should come
on briefly when you turn the ignition key to
RUN. This is
normal.
If the light doesn’t come on then, have it
fixed
so it will be ready to warn you if there is a problem.
Traction Control System (TCS)
Warning Light
TCS
OFF
If your vehicle is
equipped with the 3800
supercharged V6 engine,
the traction control
system warning light
may come on for the
following reasons:
If you turn the system off by pressing the TCS
button located on the far right side of the trip
computer, the warning light will come on and stay
on. To turn the system back on, press the button
again. The warning light should go
off. See Traction
Control System (TCS) on page
4-10 for more
information.
@ If there’s a brake system problem that is specifically
related to traction control, the traction control
system will turn
off and the warning light will come
on. If your brakes begin to overheat, the traction
control system will turn
off and the warning light will
come on until your 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, your vehicle needs service.
3-29

Enhanced Traction System Warning
Light
TRAC
OFF
If your vehicle is equipped
with a
31 00 V6 or 3800 V6
engine and the optional
ABS brake system, the
Enhanced Traction System
warning light may come on
for the following reasons:
e
e
e
If you turn the system off by pressing the TRAC
button on the far right side of the Driver Information
Center or trip computer (if equipped), the warning
light will come on and stay on. To turn the system
back on, press the button again. The warning light
should go
off. See Enhanced Traction System (ETS)
on page 4-1 1 for more information.
If the Enhanced Traction System warning light
comes on and stays on for an extended period of
time while the system is turned on, your vehicle
needs service. Adjust your driving accordingly.
If the traction control system is affected by an
engine-related problem, the system will turn off and
the warning light will come on.
When this warning light is on, the system will not limit
wheel spin. Adjust your driving accordingly.
Low Traction Light
LOW
TRAC
If your vehicle has the
Enhanced Traction
System or the Traction
Control System, this light
will also come on while
the system is limiting
wheel spin.
You may feel or hear the system working, but this is
normal. Slippery road conditions may exist
if the
low traction light comes on,
so adjust your driving
accordingly. The light will stay on for a few seconds after
the Enhanced Traction System or the Traction Control
System stops limiting wheel spin. See Enhanced
Traction System
(ETS) on page 4-1 1 or Traction Control
System (TCS) on page
4- 10.
The low traction light also comes 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 there to tell you when
the Traction Control System or Enhanced Traction
System is active.
3-30

Engine Coolant Temperature
Warning Light
TEMP
This light tells goti ihai
the engine coolant has
overheated or the
radiator cooling fan is
not working.
If you have been operating the vehicle under normal
driving conditions, you should pull
of the road, stop the
vehicle and turn
off the engine as soon as possible.
See Engine Overheating on page
5-33.
Engine Coolant Temperature Gage
United States
19
Canada
Your vehicle has a gage that shows the engine coolant
temperature.
If the gage pointer moves into the
shaded area, the engine is too hot.
That reading means the same thing as the warning
light. It means that the engine coolant has overheated.
If you have been operating the vehicle under normal
conditions, you should pull
off the road, stop the vehicle,
and turn
off the engine as soon as possible.
See Engine Overheating
on page 5-33.
3-31

Malfunction indicator Lamp
Service Engine Soon Light in the
United States or Check Engine Light
in Canada
SERVICE
ENGINE SOON
United States
~~
Canada
Your vehicle is equipped with a computer which
monitors operation of the fuel, ignition and emission
control systems.
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 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,
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.
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.
3-32