GMC 1999 Savana Van Owner's Manual page 341

Long Trip/Highway Scheduled Maintenance -- Gasoline Engines
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Replace fuel filter.
An Emission Control Service. (See footnote
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Replace air cleaner filter. An Emission Control Service.
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Inspect fuel tank, cap and lines for damage or leaks. Inspect fuel cap gasket
for any damage. Replace parts as needed.
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.
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Inspect Exhaust Gas Recirculation (EGR) system as described in the service
manual. An Emission Control Service. (See footnote
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Inspect Evaporative Control System. Check all fuel and vapor lines and hoses
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for proper hook up, routing and condition. Check that the purge valve works
properly, if equipped. Replace as needed.
An Emission Control Service. (See footnote
67,500 Miles (112 500 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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DATE
ACTUAL
SERVICED BY:
MILEAGE
7-33