2003 Chevrolet Astro Owner's Manual - Page 329

0 Change automatic transmission fluid and filter if the vehicle is mainly driven under one or more these of conditions: - In heavy city traffic where theoutside 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. 36,000 Miles (60 000 km) D Change engine oil and filter (or every 3 months, whichever occurs first). An Emission Control Service. U Lubricate chassis components (or every 3 months, whichever occurs first). (See footnote #.) 0 Rotate tires. See Tire Inspection and Rotation on page 5-64 for proper rotation pattern and additional information. (See footnote +.) 0 Check readfront axle fluid level and add fluid as needed. Check constant velocity joints and axle seals for leaking. If you do not use your vehicle under any of these conditions, change the fluid and filter every 50,000 miles (83 000 km), U Rotate tires. See Tire Inspection and Rotation on page 5-64 for proper rotation pattern and additional information. (See footnote +.) 39,000 Miles (65 000 km) 0 Change engine oil and filter (or every 3 months, whichever occurs first). An Emission Control Service. 0 Lubricate chassis components (or every 3 months, whichever occurs first). (See footnote #.) tl Check readfront axle fluid level and add fluid as needed. Check constant velocity joints and axle seals for leaking. 33,000 Miles (55 000 km) 0 Change engine oil and filter (or every 3 months, whichever occurs first). An Emission Control Service. 0 Lubricate chassis components (or every 3 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. 6-10