Chevrolet 1998 Express Van Owner's Manual page 337

I
Short TripKity Maintenance Schedule
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Gasoline Engines
1
100,000 Miles (166 000 km) (Continued)
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In hilly or mountainous terrain.
- When doing frequent trailer towing.
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Uses such as found in taxi, police or delivery service.
0
If you haven't used your vehicle under severe service conditions listed
previously and, therefore, haven't changed your automatic transmission fluid,
change both the fluid and filter.
An Emission Control Service.
0
Inspect Positive Crankcase Ventilation (PCV) valve.
150,000 Miles (240 000 km)
0
Drain, flush and refill cooling system (or every 60 months since last service,
whichever occurs first). See "Engine Coolant" in the Index for what to use.
Inspect hoses. Clean radiator, condenser, pressure cap and neck. Pressure test
cooling system and pressure cap.
An Emission Control Service.
MILEAGE
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