Hello. I am new to the forum and new to the Xterra, but have been spinning wrenches for many years. I recently installed a trailer hitch and ran into a pretty major problem. While trying to tighten the rear-most bolts (the ones that do not attached to the existing bumper bolts) the nut that is welded to the inside of the frame broke off and the bolt was only half way in. Now I have a completely loose bolt and am out of ideas. Any suggestions of how to fix my problem? I know I could probably have the hitch welded onto the frame and not worry about the bolts at all, but I would hate to have to permanently attach the hitch to the frame in case I ever need to remove it or replace it. So, any thoughts? Thanks, and this forum rocks!