Chevrolet 2001 Express Van Owner's Manual page 357

Short Trip/City Scheduled Maintenance
42,000 Miles (70 000 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. (See footnote **.)
j
Rotate tires. See "Tire Inspection and Rotation" in the Index for proper
rotation pattern and additional information. (See footnote +.)
45,000 Miles (75 000 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. (See footnote **.)
j
Clean and repack the front wheel bearings (or at each brake relining,
whichever occurs first).
Diesel Engine Only: Inspect engine air cleaner filter if you are driving in dusty
conditions. Replace filter if necessary.
An Emission Control Service. (See footnote
Gasoline Engine Only: See "Engine Air Cleaner Filter Restriction Indicator
Check" in the Index.
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