2004 PONTIAC GRAND PRIX spark plugs

Additives
To provide cleaner air, all gasolines in the United States
are now required to contain additives that will help
prevent engine and fuel system deposits from forming,
allowing your emission control system to work properly.
You should not have to add anything to your fuel.
However, some gasolines contain only the minimum
amount of additive required to meet U.S. Environmental
Protection Agency regulations. General Motors
recommends that you buy gasolines that are advertised
to help keep fuel injectors and intake valves clean. If your
vehicle experiences problems due to dirty injectors or
valves, try a different brand of gasoline.
Gasolines containing oxygenates, such as ethers and
ethanol, and reformulated gasolines may be available in
your area to contribute to clean air. General Motors
recommends that you use these gasolines, particularly if
they comply with the speci®cations described earlier.
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.
5-6

Engine Speci®cations
Engine VIN Code Transmission Spark Plug Gap Firing Order
3800 V6
231 CID (3.8L L26)2 Automatic.060 inch
(1.52mm)1±6±5±4±3±2
3800 V6 Supercharged
231 CID (3.8L L32)4 Automatic.060 inch
(1.52mm)1±6±5±4±3±2
Normal Maintenance Replacement Parts
Normal Maintenance Replacement Parts
All Engines
Automatic Transmission Filter GM Part No. 24206433
Engine Air Cleaner /Filter GM Part No. 24508572, A1614C*
Oil Filter GM Part No. 25010792, PF47*
Passenger Compartment Air Filter Kit GM Part No. 10406026
Spark Plugs GM Part No. 12568387, 41-101*
Wiper Blades
Type
LengthShepherd's Hook
22 inches (56 cm)
*ACDelco
žpart number
5-105

90,000 Miles (150 000 km)
qReplace engine air cleaner ®lter. SeeEngine Air
Cleaner/Filter on page 5-22for more information.An Emission Control Service.
qFor supercharged engines only: Check the
supercharger oil level and add the proper
supercharger oil as needed (or every 36 months,
whichever occurs ®rst). See
Part D: Recommended
Fluids and Lubricants on page 6-16.An Emission
Control Service. (See footnote ².)
qRotate tires. SeeTire Inspection and Rotation on
page 5-71for proper rotation pattern and additional
information.(See footnote +.)
qReplace passenger compartment air ®lter. If you
drive regularly under dusty conditions, the ®lter
may require replacement more often.
97,500 Miles (162 500 km)
qRotate tires. SeeTire Inspection and Rotation on
page 5-71for proper rotation pattern and additional
information.(See footnote +.)
100,000 Miles (166 000 km)
qInspect spark plug wires.An Emission Control
Service.
qReplace spark plugs.An Emission Control Service.
qChange automatic transaxle ¯uid and ®lter if the
vehicle is mainly driven under one or more of
these conditions:
þ In heavy city traffic where the outside
temperature regularly reaches 90ÉF (32ÉC) or
higher.
þ In hilly or mountainous terrain.
þ When doing frequent trailer towing.
þ Uses such as found in taxi, police or delivery
service.
qIf you haven't used your vehicle under severe service
conditions listed previously and, therefore, haven't
changed your automatic transaxle ¯uid, change both
the ¯uid and ®lter.
150,000 Miles (240 000 km)
qDrain, ¯ush and re®ll cooling system (or every
60 months since last service, whichever occurs ®rst).
See
Engine Coolant on page 5-26for what to use.
Inspect hoses. Clean radiator, condenser, pressure
cap and neck. Pressure test the cooling system
and pressure cap.
An Emission Control Service.
qInspect engine accessory drive belt.An Emission
Control Service.
6-9