1997 Chevrolet Express Van Owner's Manual - Page 346

97,500 Miles (162 500 km) 0Change engine oil and filter (or every 12 months, whichever occurs first). An Emission Control Service. 100,000 Miles (166 000 km) 0Inspect spark plug wires. 0Replace spark plugs. An Emission C o n ~ oService. l 17 Lubricate chassis components (or every 12 months, whichever occurs first). (See footnote #.) 0Check axle fluid level and add fluid as needed. (See footnote * *.) 0Rotate tires. See "Tire Inspection and Rotation" in the Index for proper rotation pattern and additional information. (See footnote +.) 0Change automatic transmission fluid and filter if the vehicle's GVWR is over 8600 lbs. or if the vehicle is mainly driven under one or more of these conditions: - In heavy city traffic where the outside temperature regularly reaches 90°F (32°C) or higher, I DATE I ACTUAL MILEAGE ISERVICED BY1 (Continued) 7-43