1998 Chevrolet Astro Owner's Manual - Page 366

1 Long TripBighway Maintenance Schedule I I I 30,000 Miles (50 000 km) (Continued) rI1 Lubricate chassis components (or every 12 months, whichever occurs first). (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°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 anyof these conditions, change the fluid and filter every 50,000 miles (83 000 km). 0 Rotate tires. See "Tire Inspection and Rotation" in the Indexfor proper rotation pattern and additional information. (See footnote +.) 0 Replace fuel filter. An Emission Control Service. (See footnote?.) 0 Replace air cleaner filter. An Emission Control Service. 7-32