2003 GMC Sierra 1500 Pickup Owner's Manual - Page 508

75,000 Miles (125000 km) 0 Inspect engine air cleaner filter if you are driving in 82,500 Miles (137 500 km) U 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 5-74 for proper rotation pattern and additional information. (See footnote +.) dusty conditions. Replace filter if necessary. An Emission Control Service. (See footnote t.) U Check readfront axle fluid level and add fluid as needed. Check constant velocity joints and axle seals for leaking. CI Allison Transmission Only: 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 at 50,000 miles (83 000 km). 0 Rotate tires. See Tire Inspection and Rotation on page 5-74 for proper rotation pattern and additional information. (See footnote +.) 90,000 Miles (150 000 km) 0 Check readfront axle fluid level and add fluid as needed. Check constant velocity joints and axle seals for leaking. 0 Replace fuel filter. An Emission Control Service. (See Footnote t.) 0 Replace engine air cleaner filter. An Emission Control Service. 0 Rotate tires. See Tire Inspection and Rotation on page 5-74 for proper rotation pattern and additional information. (See footnote +.) 97,500 Miles (162 500 km) 0 Check readfront axle fluid level and add fluid as needed. Check constant velocity joints and axle seals for leaking. CI Rotate tires. See Tire Inspection and Rotation on page 5-74 for proper rotation pattern and additional information. (See footnote +.) 6-9