2003 PONTIAC BONNEVILLE spark plugs

Notice: Your vehicle was not designed for fuel that
contains methanol. Don’t use fuel containing
methanol. It can corrode metal parts in your fuel
system and also damage the plastic and rubber
parts. That damage wouldn’t be covered under your
warranty.
Some gasolines that are not reformulated for low
emissions may contain an octane-enhancing additive
called methylcyclopentadienyl manganese tricarbonyl
(MMT); ask the attendant where you buy gasoline
whether the fuel contains MMT. General Motors does
not recommend the use of such gasolines. Fuels
containing MMT can reduce the life of spark plugs and
the performance of the emission control system may
be affected. The malfunction indicator
lamp may turn on.
If this occurs, return to your authorized GM dealer for
service.
Fuels in Foreign Countries
If you plan on driving in another country outside the
United States or Canada, the proper fuel may be hard
to find. Never use leaded gasoline or any other fuel
not recommended in the previous text on fuel. Costly
repairs caused by use of improper fuel wouldn’t be
covered by your warranty.
To check the fuel availability, ask an auto club, or
contact a major oil company that does business in the
country where you’ll be driving.
5-7

93,000 Miles (155 000 km)
0 Change engine oil and filter (or every 3 months,
whichever occurs first).
An Emission Control Service.
(See footnote
*.)
96,000 Miles (160 000 km)
Q Change engine oil and filter (or every 3 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 +.)
99,000 Miles (165 000 km)
0 Change engine oil and filter (or every 3 months,
whichever occurs first).
An Emission Control Service.
(See footnote
*.)
100,000 Miles (166 000 km)
0 Inspect spark plug wires. An Emission Control
Service.
0 Replace spark plugs. An Emission Control Service.
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 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.
0 Inspect engine accessory drive belt. An Emission
Control Service.
6-13

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