1997 Chevrolet Astro Owner's Manual - Page 347

I Short TripKity Maintenance Schedule I - 75,000 Miles (125000 km) 0Change engine oil and filter (or every 3 months, whichever occurs first). An Emission Control Service. Uses such as found in taxi, police or delivery service. 0Lubricate chassis components (or every 3 months, whichever occurs first). (See footnote #.) c7 For Two-Wheel-Drive vehiclesonly: Clean and repack the front wheel bearings (or at each brake relining, whichever occurs first). 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 90O F (32°C) or higher. - In hilly or mountainous terrain. - When doing frequent trailer towing. If you do not use your vehicle under any these of conditions, change thefluid and filter every 30,000 miles (50 000 km). Inspect air cleaner filter if you are driving in dusty conditions. Replace filter if necessary. An Emission Control Service. (See footnote?.) 0Check readfront axle fluid level and add fluid as needed. Check constant velocity joints and axle seals for lealung. (See footnote **.) I DATE I ACTUAL MILEAGE ISERVICED BY:I 7-23