2003 PONTIAC GRAND PRIX Owners Manual

82,500 Miles (137 500 km)
0 Rotate tires. See Tire Inspection and Rotation on
page
5-69 for proper rotation pattern and additional
information. (See footnote
+.)
90,000 Miles (150 000 km)
0 Replace engine air cleaner filter. An Emission
Control Service.
0 For supercharged engines only: Check the
supercharger oil level and add the proper
supercharger oil as needed (or every 36 months,
whichever occurs first). See Part D: Recommended
Fluids and Lubricants on page
6-15. An Emission
Control Service. (See footnote
f.)
Ll Rotate tires. See Tire Inspection and Rotation on
page 5-69 for proper rotation pattern and additional
information. (See footnote
+.)
97,500 Miles (162 500 km)
U Rotate tires. See Tire Inspection and Rotation on
page 5-69 for proper rotation pattern and additional
information. (See footnote
+.)
100,000 Miles (1 66 000 km)
0 Inspect spark plug wires. An Emission Control
0 Replace spark plugs. An Emission Control Service.
Service.
CI Change
automatic transaxle fluid and filter if the
vehicle is mainly driven under one or more
of
these conditions:
- In heavy city traffic where the outside
temperature regularly reaches
90°F (32°C)
or higher.
- In hilly or mountainous terrain.
- When doing frequent trailer towing.
- Uses such as found in taxi, police or delivery
service.
0 If you haven’t used your vehicle under severe service
conditions listed previously and, therefore, haven’t
changed your automatic transaxle fluid, change both
the fluid and filter.
150,000 Miles (240 000 km)
0 Drain, flush and refill cooling system (or every
60 months since last service, whichever occurs first).
See Engine Coolant on page
5-30 for what to use.
Inspect hoses. Clean radiator, condenser, pressure
cap and neck. Pressure test the cooling system
and pressure cap. An Emission Control Service.
0 Inspect engine accessory drive belt. An Emission
Control Service.
6-8

Part B: Owner Checks and Services
Listed in this part are owner checks and services
which should be performed at the intervals specified to
help ensure the safety, dependability and emission
control performance of your vehicle.
Be sure any necessary repairs are completed at once.
Whenever any fluids or lubricants are added to your
vehicle, make sure they are the proper ones, as
shown in Part D.
At Each Fuel Fill
It is important for you or a service station attendant to
perform these underhood checks at each fuel fill.
Engine Oil bevel Check
Check the engine oil level and add the proper oil if
necessary. See Engine Oil on page 5-18 for further
details.
Engine Coolant Level Check
Check the engine coolant level and add DEX-COOL@
coolant mixture
if necessary. See Engine Coolant
on page 5-30 for further details.
Windshield Washer Fluid Level Check
Check the windshield washer fluid level in the windshield
washer tank and add the proper fluid
if necessary.
See Windshield Washer Fluid on page 5-48 for
further details.
At Least Once a Month
Tire Inflation Check
Make sure tries are inflated to the correct pressures.
Don’t forget to check your spare tire. See Tires
on
page 5-68 for further details.
Cassette Tape Player Service
Clean cassette tape player. Cleaning should be done
every
50 hours of tape play. See Audio System(s)
on page 3-44 for further details.
6-9

At Least Twice a Year
Restraint System Check
Make sure the safety belt reminder light and all your belts,
buckles, latch plates, retractors and anchorages are
working properly. Look for any other loose or damaged
safety belt system parts. If you see anything that might
keep a safety belt system from doing its job, have it
repaired. Have any torn or frayed safety belts replaced.
Also look for any opened or broken air bag coverings,
and have them repaired or replaced. (The air bag
system does not need regular maintenance.)
Wiper Blade Check
Inspect wiper blades for wear or cracking. Replace
blade inserts that appear worn or damaged or that
streak or miss areas of the windshield.
Also see
“Windshield Wiper and Wiper Blades” under Cleaning
the Outside
of Your Vehicle on page 5-9 1.
Weatherstrip Lubrication
Silicone grease on weatherstrips will make them last
longer, seal better, and not stick or squeak. Apply
silicone grease with a clean cloth. During very cold, damp weather more frequent
application may be
required. See Part
D: Recommended Fluids and
Lubricants on page
6- 15.
Automatic Transaxle Check
Check the transaxle fluid level; add if needed. See
Automatic Transaxle Fluid on page
5-27. A fluid loss
may indicate a problem. Check the system and repair
if needed.
At Least Once a Year
Key Lock Cylinders Service
Lubricate the key lock cylinders with the lubricant
specified in Part D.
Body Lubrication Service
Lubricate all hood hinges, hood latch assembly,
secondary latch, pivots, spring anchor, release pawl,
door hinges, rear compartment, glove box door, console
door and any folding seat hardware. Part D tells you
what to use. More frequent lubrication may be required
when exposed to a corrosive environment.
6-1 0

Starter Switch Check Automatic Transaxle Shift Lock Control
System Check
1. Before you start, be sure you have enough room
around the vehicle.
2. Firmly apply both the parking brake and the regular
brake. See Parking Brake on page 2-27
if
necessary.
Do not use the accelerator pedal, and be ready to
turn off the engine immediately
if it starts.
3. Try to start the engine in each gear. The starter
should work only in PARK
(P) or NEUTRAL (N).
If the starter works
in any other position, your
vehicle needs service.
When you are doi - lis check, the vehicle
could move suddenly.
If it does, you or others When you are doing this ieck, the vehicle
could be injured. Follow the steps below. could move suddenly.
If it does, you or others
could be injured. Follow the steps below.
1. Before you start, be sure you have enough room
around the vehicle.
It should be parked on a level
surface.
2. Firmly apply the parking brake. See Parking Brake
on page 2-27
if necessary.
Be ready to apply the regular brake immediately
if
the vehicle begins to move.
3. With the engine off, turn the key to the RUN
position, butdon’t start the engine. Without applying
the regular brake, try to move the shift lever out
of PARK
(P) with normal effort. If the shift lever
moves out of PARK (P), your vehicle needs service.
6-1 1

Ignition Transaxle Lock Check
While parked, and with the parking brake set, try to turn
the ignition key
to LOCK in each shift lever position.
The key should turn to LOCK only when the
The key should come out only in LOCK.
shift lever
is in PARK (P).
Parking Brake and Automatic Transaxle
Park Mechanism
C leck
---
Y
When you are doing this check our vehicle
could begin to move. You or others could be
injured and property could be damaged. Make
sure there is room in front
of your vehicle in
case it begins
to roll. Be ready to apply the
regular brake
at once should the vehicle begin
to move.
Park on a fairly steep hill, with the vehicle facing downhill.
Keeping your foot on the regular brake, set the parking
brake.
To check the parking brake’s holding ability: With the
engine running and transaxle in NEUTRAL (N),
slowly remove foot pressure from the regular brake
pedal.
Do this until the vehicle is held by the parking
brake only.
ability: With the engine running, shift
to PARK (P).
Then release the parking brake followed by the
regular brake.
To check the PARK (P) mechanism’s holding
I Underbody Flushing Service
At least every spring, use plain water to flush any
corrosive materials from the underbody. Take care to
clean thoroughly any areas where mud and other debris
can collect.
6-1 2

Part C: Periodic Maintenance
Inspections
Listed in this part are inspections and services which
should be performed at least twice a year (for instance,
each spring and fall).
You should let your dealer’s
service department
or other qualified service center do
these
jobs. Make sure any necessary repairs are
completed at once.
Proper procedures to perform these services may be
found in a service manual. See Service Publications
Ordering lnformation
on page 7- 10.
Steering, Suspension and Front
Drive Axle Boot and Seal Inspection
Inspect the front and rear suspension and steering
system for damaged, loose
or missing parts, signs of
wear or lack of lubrication. Inspect the power steering
lines and hoses for proper hook-up, binding, leaks,
cracks, chafing, etc. Clean and then inspect the drive
axle boot seals for damage, tears or leakage. Replace
seals
if necessary.
Exhaust System Inspection
Inspect the complete exhaust system. Inspect the body
near the exhaust system. Look for broken, damaged,
missing or out-of-position parts as well as open seams,
holes, loose connections or other conditions which
could cause a heat build-up in the floor pan or could let
exhaust fumes into the vehicle. See Engine Exhaust
on page
2-3 1.
Fuel System Inspection
Inspect the complete fuel system for damage or leaks.
Engine Cooling System Inspection
Inspect the hoses and have them replaced if they
are cracked, swollen or deteriorated. Inspect all pipes,
fittings and clamps; replace as needed. Clean the
outside of the radiator and air conditioning condenser.
To help ensure proper operation, a pressure test of
the cooling system and pressure cap is recommended
at least once a year.
6-1 3

Throttle System Inspection
Inspect the throttle system for interference or binding,
and for damaged or missing parts. Replace parts
as needed. Replace any components that have high
effort or excessive wear.
Do not lubricate accelerator
and cruise control cables.
Brake System Inspection
Inspect the complete system. Inspect brake lines and
hoses for proper hook-up, binding, leaks, cracks,
chafing, etc. Inspect disc brake pads for wear and rotors
for surface condition. Inspect other brake parts,
including calipers, parking brake, etc. Check parking
brake adjustment.
You may need to have your brakes
inspected more often
if your driving habits or
conditions result in frequent braking.
6-1 4

Part D: Recommended Fluids and
Lubricants
Fluids and lubricants identified below by name,
part number or specification may be obtained from
your dealer.
I I50/50 mixture of clean, drinkable
water and use only DEX-COOL
I coolant Coolant.
See Engine Coolant on
I I paae 5-30.
-
I
Usage
Automatic
Transaxle
Key Lock
Cylinders
Supercharger Hood Latch
Assembly,
Secondary
Latch, Pivots,
Spring Anchor
and Release
Pawl
Fluid/Lubricant
DEXRON-Ill Automatic
Transmission Fluid.
Multi-Purpose Lubricant, Superlube
(GM Part No. U.S. 12346245, in
Canada 10953474, or equivalent).
Supercharger Oil
(GM Part No. U.S.
12345982, in Canada 1095351 3).
See Supercharger Oil on page
5-24.
Lubriplate Lubricant Aerosol (GM
Part No.
U.S. 12346293, in Canada
992723, or equivalent) or lubricant
meeting requirements
of NLGl #2,
i Category LB or GC-LB.
i-Purpose Lubricant, Superlube
Part
No. US. 12346241, in
6-1 5