there was another thread recently speaking of cargo capacity and the consensus on Laramie crew cab 4x4 put it somewhere in the ballpark of only 750lbs available back there per specs but people seem to be loading past that ok. I know I have put about 1000lbs of men in my laramie 4x4 crew cab with about 400lbs of building material in the back and I was ok but could tell the truck was loaded