2004 PONTIAC GRAND PRIX cooling

Trunk
{CAUTION:
It can be dangerous to drive with the trunk lid
open because carbon monoxide (CO) gas can
come into your vehicle. You can't see or smell
CO. It can cause unconsciousness and even
death. If you must drive with the trunk lid
open or if electrical wiring or other cable
connections must pass through the seal
between the body and the trunk lid:
·Make sure all other windows are shut.
·Turn the fan on your heating or cooling
system to its highest speed and select the
control setting that will force outside air
into your vehicle. See ªClimate Control
Systemº in the Index.
·If you have air outlets on or under the
instrument panel, open them all the way.
See ªEngine Exhaustº in the Index.
Trunk Lock
To unlock the trunk from the outside, insert the key into
the lock on the trunk and turn it clockwise. You can
also press the open trunk symbol on the remote keyless
entry transmitter. See
Remote Keyless Entry System
Operation on page 2-5for more information.
The ignition must be off, or, the transaxle must be in
PARK (P), in order for the trunk to open.
Remote Trunk Release
This feature is used to unlock the trunk from inside the
vehicle using the power door lock switch.
Press and hold the
power door lock switch
to the left for one and
one-half seconds to
unlock the trunk.
The transaxle must be in PARK (P) to activate the
trunk release.
2-10

Climate Controls
Climate Control System
Manual Climate Control System
The climate control system allows you to manually
control the heating, cooling and ventilation for the vehicle.
Fan
9
(Fan):Turn the knob by this symbol, located on
the left side of the climate control panel, clockwise or
counterclockwise to increase or decrease the fan speed.During the highest fan speed selections, the fan speed
will be temporarily reduced between the transition to a
new mode. The fan will resume the original speed when
the transition to the new mode is complete.
9(Off):Turn the knob to this position to turn the
fan off.
Mode
Turn the middle knob to select the following modes:
H(Vent) Outside Air:This mode directs outside air
to the instrument panel outlets. If you are in city traffic,
and the vehicle is stopped and idling, or the weather is
hot, you may switch from this mode to the recirculation
mode. To prevent the air inside the vehicle from
becoming stale, be sure to return to the vent mode
periodically.
)(Bi-Level):This mode directs half of the air to the
instrument panel outlets, and then directs the remaining
air to the ¯oor outlets. Some air may be directed toward
the windshield. Slightly cooler air is directed to the
instrument panel outlets and warmer air is directed to
the ¯oor outlets.
3-25

Engine Coolant Temperature
Warning Light
This light tells you that
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 off the road, stop the
vehicle, and turn off the engine as soon as possible.
See
Cooling System on page 5-32for more information.
Engine Coolant Temperature Gage
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 engine
coolant has overheated. If you have been operating the
vehicle under normal driving conditions, you should
pull off the road, stop the vehicle, and turn off the engine
as soon as possible.
See
Cooling System on page 5-32for more information.
3-39

If you drive regularly in steep country, or if you're
planning to visit there, here are some tips that can make
your trips safer and more enjoyable.
·Keep your vehicle in good shape. Check all ¯uid
levels and also the brakes, tires, cooling system
and transaxle. These parts can work hard on
mountain roads.
·Know how to go down hills. The most important
thing to know is this: let your engine do some of
the slowing down. Shift to a lower gear when you
go down a steep or long hill.
{CAUTION:
If you don't shift down, your brakes could get
so hot that they wouldn't work well. You would
then have poor braking or even none going
down a hill. You could crash. Shift down to let
your engine assist your brakes on a steep
downhill slope.
{CAUTION:
Coasting downhill in NEUTRAL (N) or with the
ignition off is dangerous. Your brakes will have
to do all the work of slowing down. They could
get so hot that they wouldn't work well.
You would then have poor braking or even none
going down a hill. You could crash. Always have
your engine running and your vehicle in gear
when you go downhill.
·Know how to go uphill. You may want to shift down to
a lower gear. The lower gears help cool your engine
and transaxle, and you can climb the hill better.
·Stay in your own lane when driving on two-lane
roads in hills or mountains. Don't swing wide or cut
across the center of the road. Drive at speeds that let
you stay in your own lane.
·As you go over the top of a hill, be alert. There could
be something in your lane, like a stalled car or an
accident.
·You may see highway signs on mountains that warn
of special problems. Examples are long grades,
passing or no-passing zones, a falling rocks area
or winding roads. Be alert to these and take
appropriate action.
4-27

Maintenance When Trailer Towing
Your vehicle will need service more often when you're
pulling a trailer. SeePart A: Scheduled Maintenance
Services on page 6-4for more information. Things that
are especially important in trailer operation are automatic
transaxle ¯uid (don't over®ll), engine oil, drive belts,
cooling system and brake system. Each of these is
covered in this manual, and the Index will help you ®nd
them quickly. If you're trailering, it's a good idea to review
this information before you start your trip.
Check periodically to see that all hitch nuts and bolts
are tight.
Engine Cooling When Trailer Towing
Your cooling system may temporarily overheat during
severe operating conditions. SeeEngine Overheating
on page 5-29.
4-44

Service............................................................5-3
Doing Your Own Service Work.........................5-3
Adding Equipment to the Outside
of Your Vehicle...........................................5-4
Fuel................................................................5-4
Gasoline Octane............................................5-4
Gasoline Speci®cations....................................5-5
California Fuel...............................................5-5
Additives.......................................................5-6
Fuels in Foreign Countries...............................5-7
Filling Your Tank............................................5-7
Filling a Portable Fuel Container.....................5-10
Checking Things Under the Hood....................5-10
Hood Release..............................................5-11
Engine Compartment Overview.......................5-12
Engine Oil...................................................5-16
Supercharger Oil..........................................5-21
Engine Air Cleaner/Filter................................5-22
Automatic Transaxle Fluid..............................5-24
Engine Coolant.............................................5-26
Radiator Pressure Cap..................................5-29
Engine Overheating.......................................5-29
Cooling System............................................5-32
Power Steering Fluid.....................................5-42
Windshield Washer Fluid................................5-43Brakes........................................................5-45
Battery........................................................5-48
Jump Starting...............................................5-49
Headlamp Aiming...........................................5-56
Bulb Replacement..........................................5-59
Halogen Bulbs..............................................5-59
Headlamps and Sidemarker Lamps.................5-60
Front Turn Signal, Parking and
Fog Lamps...............................................5-62
Center High-Mounted Stoplamp (CHMSL).........5-64
Taillamps, Turn Signal, and Stoplamps............5-64
Back-Up Lamps............................................5-65
Replacement Bulbs.......................................5-66
Windshield Wiper Blade Replacement..............5-67
Tires..............................................................5-68
In¯ation -- Tire Pressure................................5-69
Tire Pressure Monitor System.........................5-70
Tire Inspection and Rotation...........................5-71
When It Is Time for New Tires.......................5-72
Buying New Tires.........................................5-73
Uniform Tire Quality Grading..........................5-74
Wheel Alignment and Tire Balance..................5-75
Wheel Replacement......................................5-75
Tire Chains..................................................5-77
Section 5 Service and Appearance Care
5-1

A. Windshield Washer Fluid Reservoir. (SeeWindshield
Washer Fluid on page 5-43.)
B. Remote Positive (+) Battery Terminal. (See
Jump
Starting on page 5-49.)
C. Battery. (See
Battery on page 5-48).
D. Underhood Fuse Block. (See
Fuses and Circuit
Breakers on page 5-99.)
E. Radiator Pressure Cap. (See
Cooling System on
page 5-32).
F. Engine Coolant Recovery Tank. (See ªChecking
Coolantº under
Cooling System on page 5-32.)
G. Power Steering Fluid Reservoir (low in engine
compartment). (See
Power Steering Fluid on
page 5-42.)H. Electric Cooling Fan. (See
Cooling System on
page 5-32.)
I. Engine Oil Dipstick. (See
Engine Oil on page 5-16.)
J. Engine Oil Fill Cap. See
Engine Oil on page 5-16.
K. Automatic Transaxle Fluid Dipstick. (See
Automatic
Transaxle Fluid on page 5-24.)
L. Engine Coolant Bleed Valve. (See ªHow to Add
Coolant to the Radiatorº under
Cooling System on
page 5-32.)
M. Brake Master Cylinder. (See ªBrake Fluidº under
Brakes on page 5-45.)
N. Engine Air Cleaner/Filter. (See
Engine Air
Cleaner/Filter on page 5-22.)
5-13

A. Windshield Washer Fluid Reservoir. (SeeWindshield
Washer Fluid on page 5-43.)
B. Remote Positive (+) Battery Terminal. (See
Jump
Starting on page 5-49.)
C. Battery. (See
Battery on page 5-48.)
D. Underhood Fuse Block. (See
Fuses and Circuit
Breakers on page 5-99.)
E. Radiator Pressure Cap. (See
Cooling System on
page 5-32.)
F. Engine Coolant Recovery Tank. (See ªChecking
Coolantº under
Cooling System on page 5-32.)
G. Power Steering Fluid Reservoir (low in engine
compartment). (See
Power Steering Fluid on
page 5-42.)
H. Supercharger Oil Fill Location. (See
Supercharger
Oil on page 5-21.)I. Electric Cooling Fan. (See
Cooling System on
page 5-32.)
J. Engine Oil Dipstick. (See
Engine Oil on page 5-16.)
K. Engine Oil Fill Cap. (See
Engine Oil on page 5-16.)
L. Engine Coolant Bleed Valve. (See ªHow to Add
Coolant to the Radiatorº under
Cooling System on
page 5-32.)
M. Automatic Transaxle Fluid Dipstick. (See
Automatic
Transaxle Fluid on page 5-24.)
N. Brake Master Cylinder. (See ªBrake Fluidº under
Brakes on page 5-45.)
O. Engine Air Cleaner/Filter. (See
Engine Air
Cleaner/Filter on page 5-22.)
5-15