1999 Chevrolet Express Van Owner's Manual - Page 339

yellowblue Long Trip/Highway Scheduled Maintenance -- Gasoline Engines j Vehicles With GVWR Above 10,000 lbs. Only: Inspect shields for damage or j looseness. Adjust or replace as required. This is a Noise Emission Control Service. Applicable only to vehicles sold in the United States. Rotate tires. See "Tire Inspection and Rotation" in the Index for proper rotation pattern and additional information. (See footnote +.) 50,000 Miles (83 000 km) j Change 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. - In hilly or mountainous terrain. - When doing frequent trailer towing. - Uses such as found in taxi, police or delivery service. If you do not use your vehicle under any of these conditions, change the fluid and filter at 100,000 miles (166 000 km). DATE ACTUAL MILEAGE SERVICED BY: 7-31