Buick 2001 Park Avenue Owner's Manual page 353

Short Trip/City Scheduled Maintenance
45,000 Miles (75 000 km)
j
Change engine oil and filter (or every 3 months, whichever occurs first).
An Emission Control Service. (See footnote *.)
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Inspect engine air cleaner filter if you are driving in dusty conditions.
Replace filter if necessary.
An Emission Control Service. (See footnote
48,000 Miles (80 000 km)
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Change engine oil and filter (or every 3 months, whichever occurs first).
An Emission Control Service. (See footnote *.)
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Replace passenger compartment air filter.
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Rotate tires. See "Tire Inspection and Rotation" in the Index for proper rotation
pattern and additional information. (See footnote @.) (See footnote +.)
50,000 Miles (83 000 km)
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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 do not use your vehicle under any of these conditions, change the fluid
and filter at 100,000 miles (166 000 km).
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