1998 Chevrolet Astro Owner's Manual - Page 345
1998 Chevrolet Astro Manual
Page 345 highlights
1 Short TripKity Maintenance Schedule I 0 Inspect air cleaner filter if you are driving in dusty conditions. Replace filter if necessary. An Emission Control Service. (See footnote?.) 0 Check readfront axle fluid level and add fluid as needed. Check constant velocity joints and axle seals for leaking. (See footnote **.) 0 For Two-Wheel-Drive vehicles only: Clean and repack the front wheel bearings (or at each brake relining, whichever occurs first). 0 Change 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 O F (32 O C) orhigher. - In hilly or mountainous terrain. - When doing frequent trailer towing. - Uses such as found in taxi, police or delivery service. I you do not use yaw- vehicle under anyof these conditions, changethejiruid f andfilter every 50,000 miles (83 000 km). 18,000 Miles (30 000 km) 0 Change engine oil and filter (or every 3 months, whichever occurs first). An Emission Control Service. 7-11