2003 PONTIAC BONNEVILLE engine

7,500 Miles (12 500 km)
0 Change engine oil and filter (or every 12 months,
whichever occurs first).
An Emission Control
Service. (See footnote
*.)
0 Rotate tires. See Tire Inspection and Rotation on
page
5-65 for proper rotation pattern and additional
information.
(See footnote @.) (See footnote +.)
15,000 Miles (25 000 km)
0 Change engine oil and filter (or every 12 months,
whichever occurs first).
An Emission Control
Service. (See footnote
*.)
0 Rotate tires. See Tire Inspection and Rotation on
page
5-65 for proper rotation pattern and additional
information.
(See footnote @.) (See footnote +.)
22,500 Miles (37 500 km)
0 Change engine oil and filter (or every 12 months,
whichever occurs first).
An Emission Control
Service. (See footnote
*.)
0 Rotate tires. See Tire Inspection and Rotation on
page
5-65 for proper rotation pattern and additional
information.
(See footnote @.) (See footnote +.)
30,000 Miles (50 000 km)
0 Change engine oil and filter (or every 12 months,
whichever occurs first).
An Emission Control
Service. (See footnote
*.)
0 Rotate tires. See Tire Inspection and Rotation on
page
5-65 for proper rotation pattern and additional
information.
(See footnote @.) (See footnote +.)
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
6-24. An Emission
Control Service. (See footnote
t.)
37,500 Miles (62 500 km)
0 Change engine oil and filter (or every 12 months,
whichever occurs first).
An Emission Control
Service. (See footnote
*.)
0 Rotate tires. See Tire Inspection and Rotation on
page
5-65 for proper rotation pattern and additional
information.
(See footnote @.) (See footnote +.)
6-1 4

45,000 Miles (75 000 km)
0 Change engine oil and filter (or every 12 months,
whichever occurs first).
An Emission Control
Service. (See footnote
*.)
0 Rotate tires. See Tire Inspection and Rotation on
page
5-65 for proper rotation pattern and additional
information.
(See footnote @.) (See footnote +.)
50,000 Miles (83 000 km)
0 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.
If Imrr An nnt I Icn yehjde ~~.ncfer 2n1/ nf thpcp I, /'" U" S.". U"V J -. -..---
conditions, change the fluid and filter at 100,000 miles
(I 66 000 km).
52,500 Miles (87 500 km)
0 Change engine oil and filter (or every 12 months,
whichever occurs first).
An Emission Control
Service. (See footnote
*.)
page 5-65 for proper rotation pattern and additional
information.
(See footnote @I.) (See footnote +.)
0 Rotate tires. See Tire Inspection and Rotation on
60,000 Miles (100 000 km)
Cl Change engine oil and filter (or every 12 months,
whichever occurs first).
An Emission Control
Service. (See footnote
*.)
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
6-24. An Emission
Control Service. (See footnote
t.)
0 Rotate tires. See Tire Inspection and Rotation on
page
5-65 for proper rotation pattern and additional
information (See footnote @.) !See footnote +.)
0 Replace engine air cleaner filter. An Emission Control
Service.
6-1 5

67,500 Miles (112 500 km)
0 Change engine oil and filter (or every 12 months.
whichever occurs first).
An Emission Control
Service. (See footnote
*.)
0 Rotate tires. See Tire Inspection and Rotation on
page 5-65
for proper rotation pattern and additional
information.
(See footnote @.) (See footnote +.)
75,000 Miles (125 000 km)
0 Change engine oil and filter (or every 12 months,
whichever occurs first).
An Emission Control
Service. (See footnote
*.)
d Rotate tires. See Tire Inspection and Rotation on
page 5-65
for proper rotation pattern and additional
information.
(See footnote 62.) (See footnote +.)
82,500 Miles (137 500 km)
0 Change engine oil and filter (or every 12 months,
whichever occurs first).
An Emission Control
Service. (See footnote
*.)
0 Rotate tires. See Tire Inspection and Rotation on
page 5-65 for proper rotation pattern and additional
information.
(See footnote @.) (See footnote +.)
90,000 Miles (150 000 km)
0 Change engine oil and filter (or every 12 months
whichever occurs first).
An Emission Control
Service. (See footnote
*.)
c7 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 6-24. An Emission
Control Service. (See footnote
t.)
0 Rotate tires. See Tire Inspection and Rotation on
page 5-65 for proper rotation pattern and additional
information.
(See footnote @.) (See footnote +.)
97,500 Miles (162 500 km)
0 Change engine oil and filter (or every 12 months,
whichever occurs first).
An Emission Control
Service. (See footnote
*.)
0 Rotate tires. See Tire Inspection and Rotation on
page 5-65
for proper rotation pattern and additional
information.
(See footnote @.) (See footnote +.)
6-1 6

100,000 Miles (166 000 km)
0 Inspect spark plug wires. An Emission Control
0 Replace spark plugs. An Emission Control Service.
0 Change automatic transaxle fluid and filter if the
vehicie is mainly driven under one
or more of
these conditions:
- In heavy city traffic where the outside
Service.
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, poiice 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 5-26 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.
tl Inspect engine accessory drive belt. An Emission
Control Service.
6-1
7

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 Level Check
Check the engine oil level and add the proper oil if
necessary. See Engine Oil on page 5-75 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 5-26
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 5-40 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 5-62
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
3-77 for further details.
6-1 8

Starter Swit+ ?heck
I-
When you are doing this check, the vehicle
could move suddenly.
If it does, you or others
could be injured.
Follow the steps below.
I I
1.
2.
3.
Before you start, be sure you have enough room
around the vehicle.
Firmly apply both the parking brake and the regular
brake. See
Parking Brake on page 2-31 if
necessary.
Do not use the accelerator pedal, and be ready to
turn
off the engine immediately if it starts.
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.
Automatic Transaxle Shift Lock Control
System Check
When you are doing this check, the vehicle
could move suddenly.
If it does, you or others
could be injured.
Follow the steps below.
I I
1.
2.
3.
Before you start, be sure you have enough room
around the vehicle. It should be parked on a level
surface.
Firmly apply the parking brake. See
Parking Brake
on page 2-31 if necessary.
Be ready to apply the regular brake immediately
if
the vehicle begins to move.
With the engine
off, turn the key to the ON position,
but don’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.
6-20

ignition Transaxle Lock Check
While parked, and with the parking brake set, try to turn
the ignition key to
OFF in each shift lever position.
The key should turn to OFF only when the shift lever
0 The key should come out only in OFF.
is in PARK (P).
Parking Brake and Automatic Transaxle
Park
(P) Mechanism Check
When you are g this check, your 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.
To check the PARK (P) mechanism’s holding ability:
With the engine running, shift to PARK (P). Then
release the parking brake followed by the regular
brake.
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.
6-2 1

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 dc
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 Information on page
7-9.
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
2-36.
Fuel System Inspection
Inspect the complete fuel system for damage or leaks.
6-22