I'd tend to agree with Matt19. Very well written. You don't want to push the limit to far. I've only had the chance to pull about 3500# so far with no issues. I did install an electric brake controller which helps considerably on the stopping part. On the other hand though, I would think that GM placed the actual limit modestly, that the H3 could actually handle a little bit more weight?? so if your close, it may be ok? Obviously, I would not advise going to far over though....
