Chevrolet 2005 Astro Owner's Manual page 333

Replace engine air cleaner filter. See Engine Air
Cleaner/Filter on page 5-21 for more information.
An Emission Control Service.
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 any of
these conditions, change the fluid and filter every
50,000 miles (83 000 km).
Rotate tires. See Tire Inspection and Rotation on
page 5-65 for proper rotation pattern and additional
information. (See footnote +).
50,000 Miles (83 000 km)
If you have not used your vehicle under severe
conditions listed previously and, therefore, have
not changed your automatic transmission fluid,
change both the fluid and filter.
Change transfer case fluid.
52,500 Miles (87 500 km)
Change engine oil and filter (or every 12 months,
whichever occurs first). An Emission Control
Service.
Lubricate chassis components (or every 12 months,
whichever occurs first). (See footnote #).
Rotate tires. See Tire Inspection and Rotation on
page 5-65 for proper rotation pattern and additional
information. (See footnote +).
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