2003 Buick Regal Owner's Manual - Page 307

7,500 Miles (12 500 km) 0 Rotate tires. See Tire Inspection and Rotation on 0 Replace engine air cleaner filter. An Emission Control Service. U For supercharged engines only: Check the supercharger oil level and add the proper supercharger oil as needed (or every 36 months, whichever occurs first). See Part D: Recommended Fluids and Lubricants on page 6-15. An Emission Control Service. (See footnote f.) page 5-60 for proper rotation pattern and additional information. (See footnote @.) (See footnote +.) 15,000 Miles (25 000 km) 0 Inspect engine air cleaner filter if you are driving in dusty conditions. Replace filter if necessary. An Emission Control Service. (See footnote f.) 0 Replace passenger compartment air filter. If you drive regularly under dusty conditions, the filter may require replacement more often. U Rotate tires. See Tire Inspection and Rotation on page 5-60 for proper rotation pattern and additional information. (See footnote @.) (See footnote +.) 37,500 Miles (62 500 km) U Rotate tires. See Tire Inspection and Rotation on page 5-60 for proper rotation pattern and additional information. (See footnote @.) (See footnote +.) 22,500 Miles (37 500 km) U Rotate tires. See Tire Inspection and Rotation on page 5-60 for proper rotation pattern and additional information. (See footnote @.) (See footnote +.) 45,000Miles (75 000 km) 0 Inspect engine air cleaner filter if you are driving in dusty conditions. Replace filter if necessary. An Emission Control Service. (See footnote f.) 30,000 Miles (50 000 km) 0 Replace passenger compartment air filter. If you drive regularly under dusty conditions, the filter may require replacement more often. c1 Rotate tires. See Tire Inspection and Rotation on page 5-60 for proper rotation pattern and additional information. (See footnote @.) (See footnote +.) Replace passenger compartment air filter. If you drive regularly under dusty conditions, the filter may require replacement more often. CI Rotate tires. See Tire Inspection and Rotation on page 5-60 for proper rotation pattern and additional information. (See footnote @.) (See footnote +.) 6-6