1997 Pontiac Bonneville Owner's Manual - Page 339

Short TriplCity Maintenance Schedule ~~~ ~ 48,000 Miles (80 000 km) 0Change engine oil and filter (or every 3 months, whichever occurs first). An Emission Control Service. 50,000 Miles (83 000 km) 17 Change automatic transaxle fluid and filter if the vehide is mainly driven under one or more of these conditions: - In heavy city traffic where the outside temperature regularly reaches 90 O F (32O C) or higher. - In hilly or mountainous terrain. - When doing frequent trailer towing. - Uses such as found in taxi, police or delivery service. 0Lubricate chassis components (or every 6 months, whichever occurs first). (See footnote #.) c1 Rotate tires. See "Tire Inspection and Rotation" in the Index for proper rotation pattern and additional information. (See footnote +.) (Also see footnote ++.) Ifyou do not use your vehicle under any of these conditions, the fluid and filter do not require chancing.. DATE ACTUAL MILEAGE SERVICED BY: DATE ACTUAL SERVICED BY: -MILEAGE - - 7-16