1997 Chevrolet Astro Owner's Manual - Page 334

I Short lkip/City MaintenanceSchedule I 15,000 Miles (25 000 km) Change engine oil and filter (or every 3 months, whichever occurs first). An Emission Control Service. 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 of these conditiorzs, change the jluid und.filterevery 30,000 rniles (50 000 km). DATE ACTUAL MILEAGE SERVICED B Y 0Lubricate chassis components (or every 3 months, whichever occurs first). (See footnote #.) 0Inspect air cleaner filter if you are driving in dusty conditions. Replace filter if necessary. An Emission Control Service. (See footnotef.) 0Check readfront axle fluid level and add fluid as needed. Check constant velocity joints and axle seals for leaking. (See footnote **.) 0For Two-Wheel-Drive vehicles only: Clean and repack thefront wheel bearings (or at each brake relining, whichever occurs first). 7-10