1999 Pontiac Firebird Owner's Manual - Page 336

yellowblue Scheduled Maintenance 90,000 Miles (150 000 km) See "Engine Oil" in the Index. An Emission Control Service. (See footnote *.) Change automatic transmission 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 not use your vehicle under any of these conditions, change the fluid and filter every 50,000 miles (83 000 km). j Replace engine air cleaner filter. An Emission Control Service. j Inspect fuel tank, cap and lines for damage or leaks. Inspect fuel cap gasket for any damage. Replace parts as needed. An Emission Control Service. (See footnote[.) j Rotate tires. See "Tire Inspection and Rotation" in the Index for proper rotation pattern and additional information. (See footnote +.) j Check Oil Life Monitor. If engine oil and filter are changed, reset monitor. DATE ACTUAL MILEAGE SERVICED BY: j 7-14