Chevrolet 1999 Express Van Owner's Manual page 323

Short Trip/City Scheduled Maintenance -- Gasoline Engines
45,000 Miles (75 000 km)
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Change engine oil and filter (or every 3 months, whichever occurs first).
An Emission Control Service.
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Lubricate chassis components (or every 3 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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Clean and repack the front wheel bearings (or at each brake relining,
whichever occurs first).
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Inspect air cleaner filter if you are driving in dusty conditions. Replace filter if
necessary. An Emission Control Service. (See footnote
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Vehicles With GVWR Above 10,000 lbs. 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.
48,000 Miles (80 000 km)
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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 #.)
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Check axle fluid level and add fluid as needed. (See footnote **.)
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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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DATE
ACTUAL
SERVICED BY:
MILEAGE
DATE
ACTUAL
SERVICED BY:
MILEAGE
7-15