kicker 12
A ported enclosure is anywhere from 1.75 to 3.25 cu ft.
So with that said, you have choices, just see what kind of space you can make for it. If your good ,I don't see why you couldn't get at least 2 cu ft using some fiberglass and MDF.
It will depend on how tall you are and were the seat sit for normal driving to determine how large you can make it. Id say to shoot for 1.75-2.0 cu.ft to have good lower extension.
http://www.subthump.com/silverado.htm
They make nice enclosures for Extended cabs, BUT they usually can work make an enclosure like you want for you. I would give them a call and see what they might be able to do for you.


