I took mine to a local transfer station and the weight was about 7950 lbs. That is with a fifth wheel hitch (and rail kit) , running boards and 3/4 tank of fuel. Without the hitch and running boards it would be about 7800 lbs. Mine is a crew cab but I do not think there would be allot of difference.
The difference in a cclb and an ecsb is enormous. My lmm is 6850 at full weight with nothing added. 1/4 tank of fuel. An lml is supposedly around 350-400lbs heavier because the added frame weight. Also there are other options on the lml's that also make them heavier(def tank, exhaust brake, leafs etc) I'd assume an ecsb to be around 7000-7200 without other things on there.