I have a single cab 02 Silverado, so I know how much of a pain it is to get good bass from that small of a space. I ended up doing 1 12 behind my pass seat as well, but with a 3cuft box. I took it out for a bit, but I'm gonna re-install it here soon, this coming week I hope. The only thing we can really do with having a truck like that is either go with one 12, one 15 if you have the space and don't mind making the passengers scrunch up to fit there, or a few 8's. You could always remove the center console, but then you get into having to fabricate things and more $$$. If you're working towards a daily thing, i'd say try to find one 15 or do a few 8's to go back there.