1995 GMC Yukon Owner's Manual - Page 271

Attach the ratchet to the wheel wrench with the DOWN marking facing you. Put the other end of the wheel wrench through the rear bumper access hole, located at the passenger side edge of the license plate. Be sure the wheel wrench connects into the hoist shaft. Turn the ratchet counterclockwise to lower the spare tire. Keep turning the ratchet until the spare tire can be pulled out from under the vehicle. When the tire has been lowered, tilt the retainer at the end of the cable and pull it through the wheel opening. 5-33