Buick 1999 LeSabre Owner's Manual page 314

Short Trip/City Scheduled Maintenance
30,000 Miles (50 000 km)
j
Change engine oil and filter (or every 3 months, whichever occurs first).
An Emission Control Service. (See footnote *.)
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Lubricate chassis components (or every 6 months, whichever occurs first).
(See footnote #.)
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Replace air cleaner filter. An Emission Control Service.
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Inspect fuel tank, cap and lines for damage or leaks. Inspect fuel cap gasket
for any damage. Replace parts as needed.
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 +.)
33,000 Miles (55 000 km)
j
Change engine oil and filter (or every 3 months, whichever occurs first).
An Emission Control Service. (See footnote *.)
36,000 Miles (60 000 km)
j
Change engine oil and filter (or every 3 months, whichever occurs first).
An Emission Control Service. (See footnote *.)
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