1999 Buick Riviera Owner's Manual - Page 312

yellowblue Short Trip/City Scheduled Maintenance 21,000 Miles (35 000 km) An Emission Control Service. j Change engine oil and filter (or every 3 months, whichever occurs first). j Change engine oil and filter (or every 3 months, whichever occurs first). An Emission Control Service. j Lubricate chassis components (or every 6 months, whichever occurs first). (See footnote #.) j Rotate tires. See "Tire Inspection and Rotation" in the Index for proper rotation pattern and additional information. (See footnote +.) DATE ACTUAL MILEAGE SERVICED BY: 24,000 Miles (40 000 km) DATE ACTUAL MILEAGE SERVICED BY: 27,000 Miles (45 000 km) An Emission Control Service. j Change engine oil and filter (or every 3 months, whichever occurs first). DATE ACTUAL MILEAGE SERVICED BY: 7-10