Chevrolet 2001 Express Van Owner's Manual page 377

Long Trip/Highway Scheduled Maintenance
45,000 Miles (75 000 km)
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Change engine oil and filter (or every 12 months, whichever occurs first).
An Emission Control Service.
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Lubricate chassis components (or every 12 months, whichever occurs first).
(See footnote #.)
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Check axle fluid level and add fluid as needed. (See footnote **.)
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Vehicles With GVWR Above 10,000 lbs. or Equipped with Diesel Engine
Only: Inspect shields for damage or looseness. Adjust or replace as required.
This is a Noise Emission Control Service. Applicable only to vehicles sold in
the United States.
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Rotate tires. See "Tire Inspection and Rotation" in the Index for proper
rotation pattern and additional information. (See footnote +.)
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Diesel Engine Only: Check the air intake system installation to assure that
gaskets are properly sealed and that all hose connections, fasteners and other
components are tight. Also check to be sure that the air cleaner housing is
properly seated and the cover fits tightly. Tighten connections and fasteners or
replace damaged parts as necessary. This is a Noise Emission Control Service.
Applicable only to vehicles sold in the United States.
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Diesel Engine Only: If your engine has a thermostatically controlled cooling fan,
inspect hoses and ducts for proper hook
occurs first). Be sure the valve works properly. This is a Noise Emission
Control Service. Applicable only to vehicles sold in the United States.
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up (or every 12 months, whichever
DATE
ACTUAL
SERVICED BY:
MILEAGE