Buick 2000 LeSabre Owner's Manual page 350

Long Trip/Highway Scheduled Maintenance
7,500 Miles (12 500 km)
j
Change engine oil and filter (or every 12 months, whichever occurs first).
An Emission Control Service. (See footnote *.)
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Rotate tires. See "Tire Inspection and Rotation" in the Index for proper
rotation pattern and additional information. (See footnote +.)
15,000 Miles (25 000 km)
j
Change engine oil and filter (or every 12 months, whichever occurs first).
An Emission Control Service. (See footnote *.)
j
If Equipped: Replace passenger compartment air filter.
j
Rotate tires. See "Tire Inspection and Rotation" in the Index for proper
rotation pattern and additional information. (See footnote +.)
22,500 Miles (37 500 km)
j
Change engine oil and filter (or every 12 months, whichever occurs first).
An Emission Control Service. (See footnote *.)
j
Rotate tires. See "Tire Inspection and Rotation" in the Index for proper
rotation pattern and additional information. (See footnote +.)
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