2003 Chevrolet Express Van Owner's Manual - Page 355

37,500 Miles (62 500 km) 0 Check readfront axle fluid level and add fluid as 50,000Miles (83 000 km) 0 Change automatic transmission fluid and filter if the vehicle's GVWR is over 3,600 Ibs or if the vehicle is needed. Check constant velocity joints and axle seals for leaking. 0 Rotate tires. See Tire Inspection and Rotation on page 5-62 for proper rotation pattern and additional information. (See footnote +.) 45,000 Miles (75 000 km) U Check readfront axle fluid level and add fluid as needed. Check constant velocity joints and axle seals for leaking. SII Vehicles With GVWR Above 10,000 Ibs. Only: 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 at 100,000 miles ( I 66 000 km). Inspect shields for damage or looseness. Adjust or replace as required. This is a Noise Emission Control Service. Applicable only to vehicles sold in the United States. hl Rotate tires. See Tire Inspection and Rotation on page 5-62 for proper rotation pattern and additional information. (See footnote +.) 52,500Miles (87 500 km) CIJ Check rear/front axle fluid level and add fluid as needed. Check constant velocity joints and axle seals for leaking. c1 Rotate tires. See Tire Inspection and Rotation on page 5-62 for proper rotation pattern and additional information. (See footnote +.) 6-8