2004 Pontiac Grand Prix Owner's Manual - Page 393

37,500 Miles (62 500 km) u Rotate tires. See Tire Inspection and Rotation on page 5-71 for proper rotation pattern and additional information. (See footnote +.) 50,000 Miles (83 000 km) u 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. 45,000 Miles (75 000 km) u Inspect engine air cleaner filter. If necessary, replace the filter. If vehicle is driven in dusty/dirty conditions, inspect filter at every engine oil change. See Engine Air Cleaner/Filter on page 5-22 for more information. An Emission Control Service. (See footnote †.) u Rotate tires. See Tire Inspection and Rotation on page 5-71 for proper rotation pattern and additional information. (See footnote +.) u Replace passenger compartment air filter. If you drive regularly under dusty conditions, the filter may require replacement more often. If you do not use your vehicle under any of these conditions, change the fluid and filter at 100,000 miles (166 000 km). 52,500 Miles (87 500 km) u Rotate tires. See Tire Inspection and Rotation on page 5-71 for proper rotation pattern and additional information. (See footnote +.) 6-7