2003 Chevrolet Tahoe Owner's Manual - Page 470

37,500 Miles (62 500 km) 0 Check readfront axle fluid level and add fluid as needed. Check constant velocity joints and axle seals for leaking. 0 Rotate tires. See Tire Inspection and Rotation on 50,000 Miles (83 000 km) 0 Change automatic transmission fluid and filter if the vehicle's GVWR is over 8600 Ibs or 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. - page 5-62 for proper rotationpattern and additional information. (See footnote +-) 45,000 Miles (75 000 km) 0 Inspect engine air cleaner filter if you are driving in dusty conditions. Replace filter if necessary. An Emission Control Service. (See footnote t.) 0 Check readfront axle fluid level and add fluid as needed. Check constant velocity joints and axle seals for leaking. 0 Rotate tires. See Tire Inspection and Rotation on page 5-62 for proper rotationpattern and additional information. (See footnote +.) 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 (166 000 km). 0 Change transfer case fluid. 52,500 Miles (87 500 km) 0 Check readfront axle fluid level and add fluid as 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 +.) 6-7