2004 GMC Yukon Owner's Manual - Page 469

2. Use the wheel wrench to loosen all the wheel nuts. Turn the wheel wrench counterclockwise to loosen the wheel nuts. Don't remove the wheel nuts yet. Notice: If your vehicle has QUADRASTEER™ and you use a jack to raise the vehicle without positioning it correctly, you could damage the QUADRASTEER™ system. When raising your vehicle on a jack, avoid contact with tie rods and tie rod boots. Jacking Locations (Overall View) A. Front Position B. Rear Position 5-91