Chevrolet 1997 Astro Owner's Manual page 365

Replace fuel filter.
An Emission Control Service.
CI
Replace air cleaner filter.
El
Rotate tires. See "Tire Inspection and
Rotation" in the Index for proper rotation
pattern and additional information.
(See footnote
+.)
(See footnote?.)
An Emission Control Service.
97,500 Miles (162 500 km)
0
Change engine oil and filter (or every
12 months, whichever occurs first).
Cl
Lubricate chassis components (or every
12 months, whichever occurs first).
(See footnote #.)
0
Check readfkont axle fluid level and add fluid
as needed. Check constant velocity joints and
axle seals for leaking. (See footnote
**.)
El
Rotate tires. See "Tire Inspection and
Rotation" in the Index for proper rotation
pattern and additional information.
(See footnote +.)
An Emission Control Service.
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