2003 PONTIAC GRAND PRIX cooling

If the overheat warning continues, there’s one more
thing you can try. You can add the proper coolant
mixture directly to the radiator, but be sure the cooling
system is cool before you do it.
Steam and scalding liquids from a hot cooling
~
system can blow out and burn you badly. They
are under pressure, and if you turn the radiator pressure cap
-- even a little -- they can come
out at high speed. Never turn the cap when the
cooling system, including the radiator pressure
cap,
is hot. Wait for the cooling system and
radiator pressure cap to cool if you ever have
to turn the pressure cap.
5-40

40w to Add Coolant to the Radiator The radiator pressure cap is located on the passenger’s
side of the vehicle
in the front of the engine
dotice: Your engine has a specific radiator compartment, near the battery and the diagonal cross
ill procedure. Failure to follow this procedure could brace. See Engine Compartment Overview on page 5-12
:ause your engine to overheat and be severely for more information on location.
lamaged. You can remove the radiator pressure cap when the
cooling system, including the radiator pressure cap and
upper radiator hose, is no longer hot.
1. Turn the pressure cap slowly counterclockwise until
it first stops. (Don’t press down while turning the
pressure cap).
If you hear a hiss, wait for that to stop. A hiss
means there is still some pressure left.
5-4 1

8. Then fill the coolant recovery tank to COLD mark.
9. Put the cap back on the coolant recovery tank,
but leave the pressure cap
off.
10. Start the engine and let it run until you can feel the
upper radiator hose getting hot. Watch out for the
engine cooling fans.
11. By this time, the coolant level inside the radiator
filler neck may be lower.
If the level is lower, add
more
of the proper DEX-COOL@ coolant mixture
through the filler neck until the level reaches
the base of the filler neck.
5-45

If you need to replace any of your wheels, wheel bolts
or wheel nuts, replace them only with new
GM
original equipment parts. This way, you will be sure to
have the right wheel, wheel bolts and wheel nuts
for your vehicle.
Using the wrong replacement wheels, wheel
bolts or wheel nuts on your vehicle can be
dangerous.
It could affect the braking and
handling
of your vehicle, make your tires lose
air and make you lose control. You could have
a collision
in which you or others could be
injured. Always use the correct wheel, wheel
bolts and wheel
nuts for replacement.
Notice: The wrong wheel can also cause problems
with bearing life, brake cooling, speedometer or odometer calibration, headlamp aim, bumper height.
vehicle ground clearance and tire or tire chain clearance to the body and chassis.
See Changing a Flat
Tire on page 5-76 for more
information.
Used Replacement Wheels
I
Puttin, -1 used wheel on your vehicle is
dangerous. You can’t know how it’s been used
or how far
it’s been driven. It could fail suddenly
and cause a crash.
If you have to replace a
wheel, use a new
GM original equipment wheel.
5-74

Circuit Usage
Breakers
BLANK Blank - -. . . . . - . - . . . -
I PWR DROP I Power Droo lanition
CAN I
STE R
VENT
1- il
Canister Vent Solenoid
I DRL I Davtime Runnina Lamos I
Underhood Fuse Block
Fuses Usage
Cooling Fan 2
Spare
Headlamps
4 Battery Main 2
5 Ignition Main 1
5-1 00

I
21
22
I 27
Usaqe
Mass Air Flow (MAF), Heated
Sensors, Canister Purge, Boost
Solenoid
Spare
SDare
Spare lanition Module
Spare
trunk Release. Back-UD Lamps I
28 I AC Clutch, ABS Ignition
I I Remote Kevless Entrv. I
29 Theft-Deterient, Trip Computer,
HVAC Module, Security LED
30
Torque Converter Clutch (TCC) 31
Alt Sense idemarker Lamps,
Relays
Usage
Air Conditionina Clutch Diode I
9 I Coolina Fan
4
I
I 10 I Coolina Fan 2
v
1
I 11 I lanition Main I ~ ~
12 Cooling Fan 1
13 Air Conditioning Clutch
5-1 01

Capacities and Specifications
Please refer to Part D: Recommended Fluids and Lubricants on page 6-15 for more information.
Capacities and Specifications
Capacities
Application
Automatic Transaxle
1.1 kg
2.4 Ibs Air
Conditioning Refrigerant R-l34a
Metric
English
Pan Removal and Replacement
9.5 L
10.0 quarts
After Complete Overhaul
7.0 L 7.4 quarts
When drainingheplacing converter or auxiliary cooler, more fluid may be needed.
Cooling System Including Reservoir
3100 V6 (Code J)
11 -2 quarts
3800 V6 Supercharged (Code 1) 10.6
L
11.2 quarts
3800
V6 (Code
K)
10.4 L 11 .O quarts
10.6 L
5-1
02

Section 6 Maintenance Schedule
Maintenance Schedule ...................................... 6-2
Introduction
................................................... 6-2
Your Vehicle and the Environment
.................... 6-2
Maintenance Requirements
.............................. 6-2
How This Section is Organized
......................... 6-3
Part A: Scheduled Maintenance Services
........... 6-4
Using Your Maintenance Schedule
.................... 6.4
Scheduled Maintenance
.................. ......... 6.5
Part B: Owner Checks and Services
.... ..... 6.9
At Each Fuel Fill
........................................ 6-9
At Least Once a Month
................................... 6.9
At Least Twice a Year
................................... 6.10 At
Least Once a Year
................................... 6.10
Pari C: Periodic
Maintenance inspections ......... 6.13
Steering, Suspension and Front Drive Axle
Boot and Seal Inspection
............................ 6-13
Exhaust System Inspection
............................ 6.13
Fuel System Inspection
.................................. 6.13
Engine Cooling System Inspection
................... 6.13
Throttle System Inspection
............................ -6-14
Brake System Inspection
................................ 6.14
Part D: Recommended Fluids and Lubricants
.... 6-15
Part
E: Maintenance Record ........................... 6.16
6- 1