Pontiac 1998 Trans Sport Owner's Manual page 426

Long Tripmighway Maintenance Schedule
0
Rotate tires. See "Tire Inspection and Rotation'' in the Index for proper
rotation pattern
and additional information. (See footnote
+.)
90,000 Miles (150 000 km)
0
0
0
Change engine oil and filter (or every 12 months, whichever occurs first).
An Emission Control Service.
Lubricate chassis components (or every 12 months, whichever occurs first).
(See footnote #.)
Replace passenger compartment air filter.
Replace
air cleaner
filter.
An Emission Control Sewice.
Rotate tires. See "Tire Inspection and Rotation" in
the
Index for proper
rotation pattern and additional information. (See footnote
+.)
97,500
Miles (162 500 km)
0
a
Change engine oil and filter (or every 12 months, whichever occurs first).
An Emission Control Sewice.
Lubricate chassis components (or every 12 months, whichever occurs first).
(See footnote
#.)
Rotate
tires. See "Tire Inspection and Rotation" in the Index for proper
rotation pattern and additional information. (See footnote
+.)
DATE
MILEAGE
I
DATE
I
7-27