GMC 2002 Savana Van Owner's Manual page 353

Short Trip/City Scheduled Maintenance
21,000 Miles (35 000 km)
j
Change engine oil and filter (or every 3 months, whichever occurs first).
An Emission Control Service.
j
Lubricate chassis components (or every 3 months, whichever occurs first).
(See footnote #.)
j
Check axle fluid level and add fluid as needed.
24,000 Miles (40 000 km)
j
Change engine oil and filter (or every 3 months, whichever occurs first).
An Emission Control Service.
j
Lubricate chassis components (or every 3 months, whichever occurs first).
(See footnote #.)
j
Check axle fluid level and add fluid as needed.
j
Rotate tires. See "Tire Inspection and Rotation" in the Index for proper
rotation pattern and additional information. (See footnote +.)
j
Diesel Engine Only: Replace fuel cap if driving in dusty conditions.
An Emission Control Service.
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