2003 Oldsmobile Alero Owner's Manual - Page 311

90,000 Miles (150 000 km) 0 Replace engine air cleaner filter. An Emission Control Service. 0 Rotate tires. See Tire Inspection and Rotation on page 5-55 for proper rotation pattern and additional information. (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 service. If you do notuse your vehicle under anyof these conditions, the fluid and filter do not require changing. 97,500 Miles (162 500 km) 0 Rotate tires. See Tire Inspection and Rotation on page 5-55 for proper rotation pattern and additional information. (See footnote +.) 100,000 Miles (166 000 km) 0 Inspect spark plug wires (except 2.2L Code F L4 engine). An Emission Control Service. 150,000 Miles (240000 km) 0 Drain, flush and refill cooling system (or every 60 months since last service, whichever occurs first). 0 Replace spark plugs. An Emission Control Service. See Engine Coolant on page 5-23 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