1995 GMC Yukon Owner's Manual - Page 272

Changing the Tire Start with the jack, the jack handle and the ratchet. If the flat tireis on the rear of the vehicle, you'll need the jack handle extensions also. Attach thejack handle (andjack handle extension,if needed) to the jack. UP a One side of the ratchet has an marking. The other side hasDOWN marking. With the UP marking on the ratchet facing you, rotate the ratchet clockwise. That will lift the jack head a little. Before you start, put the spare tire near the tire. Remove the wheel trim and flat loosen the wheel nuts. next part will show you to do The howthese things properly. 5-34