1995 GMC Safari Owner's Manual - Page 197

The jack has a bolton the end. Attach the socket end of the extension to the jack bolt like this. Attach the ratchet to the extension with the UP side facing you. Rotate the ratchet to the right. That will raise the jack lift head a little. Before raising the vehicle, do the following steps. Before you start, block the front and rear of the tire farthest away from the one being changed. Then put your spare tire near theflat tire.