My truck is identical and the same weight. It's the heaviest duty 1/2 ton available right now. You will not be "sagging" as someone mentioned, even if you load the rear axle up to the 4800 lb rating. It sits level with that load. You can make a lightweight 5th work but plan to pack light and don't use much of the front storage(which is unrealistic). I'm debating a truck swap at the moment just to be able to pack whatever I want, wherever I want. I'm right at the max and it still handles like a champ and when unloaded it's a rocket that is capable of over 20mpg.
It is a great combo if you don't mind watching weight and don't plan to haul anything or anybody else. Heck, I see standard GM 1/2 tons hauling similar 5ths. You'd have to pull a Big Horn or Montana with an F150HD to put yourself in a similar situation.
