Well used truck but runs good. Good 6.0 LS with a 6L80 transmission and a manual transfer case. I think the fuel pump is going out. A fuel pressure test shows the needle bouncing all over and eventually looses pressure and dies. It looks like someone has put a mismatched rear differential in. When in 4x4 the rear tires will bind up and it cannot be driven. I bought the truck for an LS swap. It has the 823 rectangle port heads. Recent oil change and transmission service.