1996 Chevrolet Express Van Owner's Manual - Page 340

Long Tripmighway Maintenance Schedule -- Gasoline Engines I 90,000 Miles (150 000 km) 0Change engine oil and filter (or every 12 months, whichever occurs first). An Emission Control Service. 0Vehicles With GVWR Above 8,500 lbs. Only: Inspect shields and underhood insulation for damage or looseness. Adjust or replace as required.This is a Noise Emission Control Service. Applicableonly to vehicles sold in the United States. 0Lubricate chassis components; see footnote ## (or every 12 months, whichever occurs first). 0Check axle fluid level and add fluid as needed. ** 0Clean and repackthe front wheel bearings (or at each brake relining, whichever occurs first). 0Replace fuel filter. An Emission Control Service. 0If your engine hasa thermostatically controlled cooling fan, inspect all hoses and ducts for proper hook-up (or every 12 months, whichever occurs first). Be sure the valve works properly.This is a Noise E11lission Control Service. Applicable only to vehicles sold in the United States. 0Replace air cleaner filter. An Emission Control Service. I DATE ACTUAL MILEAGE SERVICED B Y 7-40