Chevrolet 1998 Express Van Owner's Manual page 321

I
Short TripKity Maintenance Schedule
--
Gasoline Engines
I
12,000 Miles (20 000 km)
0
Change engine oil and filter (or every 3 months, whichever occurs first).
0
Lubricate chassis components (or every 3 months, whichever occurs first).
0
Check axle fluid level and add fluid as needed. (See footnote
**.)
0
Rotate tires. See "Tire Inspection and Rotation" in the Index for proper
rotation pattern and additional information. (See footnote
+.)
MILEAGE
An Emission Control Service.
(See footnote
#.)
15,000 Miles (25 000 km)
0
Change engine oil and filter (or every 3 months, whichever occurs first).
0
Lubricate chassis components (or every 3 months, whichever occurs first).
0
Inspect air cleaner filter if you are driving in dusty conditions. Replace filter
An Emission Control Sewice.
(See footnote
#.)
if necessary.
An Emission Control Service. (See footnote?.)
0
Check axle fluid level and add fluid as needed. (See footnote
**.)
DATE
I
MILEAGE
ACTUAL
SERVICED B Y
7-10