I have a GMC Sierra X-Cab and all the sub boxes I have seen are .8 cu. ft. Does anyone know where I can buy a sub box like the ones I am looking for(The ones that go under the rear seat) but I want something like 1 cu. ft. If there are not any it cool, just seeing if anyone knows of a website.
I forget where you can buy them but, they make seat risers that basically raise your backseat a few inches to accomodate larger boxes. I think buying a box like you want will be tough. Best way would be to hire someone to make you one or do a custom one yourself.