1998 Chevrolet Astro Owner's Manual - Page 373

I LongTripmighwayMaintenanceSchedule I - In hilly or mountainous terrain. - When doing frequent trailer towing. - Uses such as found in taxi, police or delivery service. Ifyou do not use your vehicle underany of these conditions, change the fluid andfilter every 50,000 miles (83 000 kin). 0 Replace fuel filter. An Emission Control Service. (See footnote?.) 0 Replace air cleaner filter. An. Emission Control Service. 0 Rotate tires. See "Tire Inspection and Rotation" in the Index for proper rotation pattern and additional information. (See footnote +.) 97,500 Miles (162 500 km) 17 Change engine oil and filter (or every 12 months, whichever occurs first). An Emission Control Service. 0 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 Rotate tires. See "Tire Inspection and Rotation" in the Index for proper rotation pattern and additional information. (See footnote +.) DATE I 7-39