1997 Buick Riviera Owner's Manual - Page 331

I Short TriplCity Maintenance Schedule 1 I ;O,OOO Miles (100 000 km) 0( ange engine oil and filter (or every 3 months, whichever occursfirst). An Emission Control Service. 57,000 Miles (95 000 km) 0Change engine oil and filter (or every 3 months, whichever occursfirst). An Emission Control Service. 0Lubricate chassis components (or every 6 months, whichever occursfirst). (See footnote #.) 0Inspect engine accessory drive belt. An Emission Control Service. 0Replace air cleaner filter. An Emission Control Service. 0Inspect fuel tank, cap and lines for damage DATE ACTUAL MILEAGE SERVICED B Y or leaks. Inspect fuel cap gasket for any damage. Replace parts as needed. An Emission Control Service. (See footnote?.) 7-18