Chevrolet 1998 Express Van Owner's Manual page 340

Long. TriplHighway Maintenance Schedule
--
Gasoline Engines
"
22,500 Miles (37 500
km)
0
Change engine oil and filter (or every 12 months, whichever occurs first).
0
Lubricate chassis components (or
every
12 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
#.)
30,000 Miles (50 000 km)
0
Change engine oil and filter (or every 12 months, whichever occurs first).
An Emission Control Service.
0
Lubricate chassis components (or
every
12 months, whichever occurs first).
0
Check axle fluid level and add fluid as needed. (See footnote
*4'.)
0
Clean and repack the front wheel bearings (or at each brake relining,
0
Rotate tires. See "Tire Inspection and Rotation" in the Index for
(See footnote #.)
whichever occurs first).
proper rotation pattern and additional information. (See footnote
+.)
(Continued)
I
DATE
I
MILEAGE
7-29