Pontiac 1998 Firebird Owner's Manual page 335

I
Short TripKity Maintenance Schedule
I
~
18,000 Miles (30 000 km)
0
.
Change engine oil and filter (or every 3 months, whichever occurs fist).
An Emission Control Service.
Rotate tires. See "Tire Inspection and Rotation" in the Index for proper
rotation pattern and additional information. (See footnote
+.)
Change the rear axle gear lubricant if vehicle is used to pull a trailer.
DATE
I
21,000 Miles (35 000 km)
0
Change engine oil and filter (or every
3 months,
whichever occurs first).
An Emission Control Service.
24,000 Miles (40 000 km)
0
Change engine oil and filter (or every 3 months, whichever occurs first).
Change the rear axle gear lubricant if vehicle is used to pull a trailer.
0
Rotate tires. See "Tire Inspection and Rotation" in the Index for proper
An Emission Control Service.
rotation pattern and additional information. (See footnote
+.)
27,000
Miles (45 000 km)
0
Change engine oil and filter (or every 3 months, whichever occurs first).
An Emission Control Service.
MILEAGE
DATE
I
7-10