1998 Chevrolet Express Van Owner's Manual - Page 342

Long Tripmighway Maintenance Schedule-- Gasoline Engines 45,000 Miles (75 000 km) 0 Change engine oil and filter (or every 12 months, whichever occurs first). DATE I An Emission Control Service. 0 Lubricate chassis components (or every 12 months, whichever occurs first). (See footnote #.) 0 Check axle fluid level and add fluid as needed. (See footnote **.) 0 Vehicles With GVWR Above 8,500 lbs. Only: Inspect shields and underhood insulation for damage or looseness. Adjust or replace as required. This isa Noise Emission Control Service. Applicable onlyto vehicles sold in the United Stutes. 0 Rotate tires. See "Tire Inspection and Rotation" in the Index for proper rotation pattern and additional information. (See footnote +.) 50,000 M -YS , I 3 000 km) I DATE ACTUAL MILEAGE Change automatic transmission fluid and filter if the vehicle's GVWR is over 8600 lbs. or if the vehicle is mainly driven under or more of one these conditions: - In heavy city traffic where the outside temperature regularly reaches 90°F (32°C) or higher. - In hilly or mountainous terrain. I SERVICED I BY (Continued) 7-31