2003 Buick Regal Owner's Manual - Page 309

82,500 Miles (137 500 km) Ll Rotate tires. See Tire Inspection and Rotation on page 5-60for proper rotation pattern and additional information. (See footnote @.) (See footnote +.) 100,000 Miles (166 000 km) 0 Inspect spark plug wires. An Emission Control 90,000 Miles (150 000 km) 0 Replace passenger compartment air filter. If you drive regularly under dusty conditions, the filter may require replacement more often. 0 Replace engine air cleaner filter. An Emission Control Service. 0 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.) 0 Rotate tires. See Tire Inspection and Rotation on Service. 0 Replace spark plugs. An Emission Control Service. 0 Change automatic transaxle fluid and filter if the vehicle is mainly driven under one or more of these conditions: - In heavy city traffic where the outside temperature regularly reaches 90°F (32°C) or higher. - In hilly or mountainous terrain. - When doing frequent trailer towing. - Uses such as found in taxi, police or delivery service. 0 If you haven't used your vehicle under severe service conditions listed previously and, therefore, haven't changed your automatic transaxle fluid, change both the fluid and filter. page 5-60for proper rotation pattern and additional information. (See footnote @.) (See footnote +.) 150,000 Miles (240000 km) 0 Drain, flush and refill cooling system (or every 97,500 Miles (162 500 km) C Rotate tires. See Tire Inspection and Rotation on l page 5-60for proper rotation pattern and additional information. (See footnote @.)(See footnote +.) 60 months since last service, whichever occurs first). See Engine Coolant on page 5-24 for what to use. Inspect hoses. Clean radiator, condenser, pressure cap and neck. Pressure test the cooling system and pressure cap. An Emission Control Service. 0 Inspect engine accessory drive belt. An Emission Control Service. 6-8