Is anyone else having any problems with there rear captains chairs armrest coming loose. I made a 1000 mile trip in my new Z71 Suburban about a week ago and the armrest kept coming loose. I stopped in a auto zone and bought a ratchet and socket to tighten it back up and it seemed to hold for a short period but it is loose again. I have 1200 miles on it and have tightened it twice now and its loose again. I know its under waranty but I hate to hassel with taking it in for something so minor that I can tighten myself, but it keeps coming loose again and when its loose it spins all the way around and does not lock down or up. Anyone else deeling with this on a GMT 900 SUV with rear buckets? Any idea what to do to fix it?