1997 Chevrolet Astro Owner's Manual - Page 359
1997 Chevrolet Astro Manual
Page 359 highlights
1,ong Trip/Highway Maintenance Schedule 45,000 Miles (75 000 km) 0Change engine oil and filter (or every 12 months, whichever occursfirst). An Emission Control Service. - 0Lubricate chassis components (or every 12 months, whichever occurs first). (See footnote #.) 0Check readfront axle fluid level and add fluid as needed. Check constant velocity joints and axle seals for leaking. (See footnote **.) 0Change automatic transmission fluid and filter 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. I f you do not use your vehicle under any o these f conditions, change the fluid and*filter every 30,000 miles (50 000 km). I7 Rotate tires. See "Tire Inspection and Rotation" in the Index for proper rotation pattern and additional information. (See footnote +.) DATE ACTUAL MILEAGE SERVICED B Y 7-35