1997 Chevrolet Astro Owner's Manual - Page 361

In heavy city traffic where the outside temperature regularly reaches O F 90 (32°C) or higher. - In hilly or mountainous terrain. - When doing frequent trailer towing. - Uses such as found in taxi, police or delivery service. - engine accessory drive belt. Replace fuel filter. Emission Control Service. An (See footnote?.) 0Replace air cleaner filter. An Emission ControlService. 0Inspect 13 Inspect fuel tank, cap and lines for damage or leaks. Inspect fuel cap gasket for any damage. Replace parts as needed. An Emission Control Service. (See footnote?.) I you do not useyour vehicle under any of these f conditions, change thefluid and filter every 30,000 m l s (50 000 km). ie 0Rotate tires. See "Tire Inspection and Rotation" in the Index for proper rotation pattern and additional information. (See footnote+.) 7-37