1997 Buick LeSabre Owner's Manual - Page 348

I Long Trip/Highway Maintenance Schedule 90,000 Miles (150 000 km) 0Change engineoil and filter (or every 12 months, whichever occurs first). An Emission Control Service. (See footnote *.) 0Lubricate chassis components (or every 12 months, whichever occurs first). (See footnote#.) Replace aircleaner filter. An Emission Control Service. 0Inspect fuel tank, cap and lines for damage or leaks. Inspect fuel cap gasketfor any damage. Replaceparts as needed. An Emission Control Service. (See footnote?.) 0Rotate tires. See "Tire Inspection and Rotation'' in the Index proper rotation for pattern and additional information. (See footnote +.) (Also see footnote ++.) DATE MILEAGE ACTUAL SERVICED BY: 7-36