Pontiac 1999 Firebird Owner's Manual page 335

Scheduled Maintenance
j
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 Rotate tires. See "Tire Inspection and Rotation" in the Index for proper
rotation pattern and additional information. (See footnote +.)
82,500 Miles (137 500 km)
j Rotate tires. See "Tire Inspection and Rotation" in the Index for proper
rotation pattern and additional information. (See footnote +.)
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DATE
ACTUAL
SERVICED BY:
MILEAGE
7-13