2003 Chevrolet Impala Owner's Manual - Page 366

90,000 Miles (150 000 km) 0 If Equipped: 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 Rotate tires. See Tire Inspection and Rotation on page 5-64 for proper rotation pattern and additional information. (See footnote @.)(See footnote +-) 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 97,500 Miles (162 500 km) CI Rotate tires. See Tire Inspection and Rotation on page 5-64 for proper rotation pattern and additional information. (See footnote @.)(See footnote +.) service. U If you haven't used your vehicle under severe conditions listed previously and, therefore, haven't changed your automatic transaxle fluid, change both the fluid and filter. 100,000 Miles (166 000 km) Ll Inspect spark plug wires. An Emission Control 150,000 Miles (240000 km) CJ Drain, flush and refill cooling system (or every 60 months since last service, whichever occurs first). See Engine Coolant on page 5-26 for what to use. Inspect hoses. Clean radiator, condenser, pressure cay, and neck Pressl.!re test the ceding 9)lst~m and pressure cap. An Emission Control Service. 0 Inspect engine accessory drive belt. An Emission Control Service. Service. 0 Replace spark plugs. An Emission Control Service. 6-9