2003 GMC Envoy Owner's Manual - Page 408

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 5-58 for proper rotation pattern and additional information.(See footnote +.) 52,500 Miles (87 500 km) U Check readfront axle fluid level and add fluid as needed. Check constant velocity joints and axle seals for iea-king, 0 Rotate tires. See Tire lnspection and Rotation on page 5-58 for proper rotation pattern and additional information. (See footnote +.) 60,000 Miles (100 000 km) 0 Check readfront axle fluid level and add fluid as 50,000 Miles (83000 km) 0 Change automatic transmission fluid and filter if the vehicle is mainly driven under or more of these one conditions: - In heavy city trafficwhere 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 youdo not use your vehicle under any of these conditions, change the fluid and filter at 100,000 miles ( I 66 000 km). 0 Automatic Transfer Case Only: Change transfer case fluid. needed. Check constant velocity joints and axle seals for leaking. 0 Rotate tires. See Tire Inspection and Rotation on page 5-58for proper rotation pattern and additional information. (See footnote +.) 0 Replace fuel filter. A n Emission Control Service. (See footnote t.) 0 Replace engine air cleaner filter. An Emission Control Service. 6-7