Buick 1994 Century Owner's Manual page 273

6. 'Ikande Service
--
Change both the fluid and filter
every 15,000 miles (25 0oO km) 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.
0
In hilly or mountainous terrain.
0
When doing frequent trailer towing.
Uses such as found in
taxi,
police car or delivery
service.
9. Exhaust G a s
Recirculation (EGR) System
Inspection (2.2 L Code 4 engine only)
*?
---
Conduct the EGR system service as described in the
service manual. T o purchase a service manual, see
"Service Publications" in the Index.
10.
Air Cleaner Filter Replacement*
--
Replace every
30,000 miles (50 0o0 km) or more often under dusty
conditions. Ask your dealer for the proper
replacement intervals for your driving conditions.
11. Fuel Tank, Cap and Lines Inspection*?
--
Inspect
fuel
t a n k ,
cap and lines for damage or leaks. Inspect
fuel cap gasket for an even filler neck imprint
or any
damage. Replace parts as needed. Periodic
replacement of the fuel filter is not required.
If you do not use your vehicle under any of these
conditions, change both the fluid and filter every
100,OOO miles (160 OOO km).
7. Spark Plug Replacement*
--
Replace spark plugs
with the proper type. See "Specifications Chart" in
the Index.
8.
Spark Plug Wire Inspection*'f'
--
Inspect for bums,
cracks or other damage. Check the boot fit at the
distributor and at the spark plugs. Replace wires as
needed.
*
An Emission Control Service.
The
U.S. Environmental Protection Agency or the California Air Resources Board has determined that the failure
to perform this maintenance item will not nullify the
emission warranty or limit recall liability prior
to
the completion of vehicle useful life. General Motors, however, urges that
all recommended maintenance services be
performed at the indicated intervals and the maintenance be recorded in "Section E:Maintenance Record".
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