My 2004 17ft aerocell with 1/2 tank,and me not in it[I weight 250]scaled at 7820lb.This is a g3500 dual rear wheel,12000gvw truck.It has been recerifited to 13950 by spring and other approved by dot modifications.This was so when at running weight I could haul 4000lb.This weight empty did include the sleeper wall,and a super heavy "forklift" rear bumper with a built in class 4 hitch.Also it has a 3in southern yellow pine floor,and roll up door.It all added to the empty weight.It is about to traded in on a small "c" dock high.more on that later.I will add,one of the big reasons is the fuel filter is part of the pump,the centerbearing on the drive shaft is NOT replaceable requires a whole new shaft,the dual idler arms have no part number,were recalled ,but only under 100,000 miles and 600$ for a engine miss that I then fixed for 25cents.