box for 04' 2500 Hd

i have a 04' chevy 2500 Hd with a crewcab and i am trying to find a box that will fit behind the seat will anyone give me dimesions for one

Are you looking to build a custom box yourself or are you looking for a box pre-fit for that truck? What kind of subs are you using? If your building the box yourself then the first step is easy. You already have the truck so now pull out a tape measure and start measuring where you want the box. It's that easy. The next step will require a little more effort....building the box.

i have three directed audio studio 10"s 3104 models can anyone help

I made a sealed box for 2 10" kicker comp VR's, I made it so that it fit under the seat, it falls between the seat frames and has a hump in the middle two fit over the trany  hump, the speakers face upward and there is no division inside the box, I used 3/4'' MDF to make the box. This particular customer looked around for a box that fit behind his seats but at the time no one had anything worth buying,  his truck is a 2005 GMC crew cab 2500HD. If you are interested I may be able to email you a picture, let me know