I have a sub and an amp from my previous truck. I was originally going to wait until after I upgraded my head unit and speakers to see how it would fit in my "new" truck. Well, I've realized it will be a long time before I will be able to get that new head unit and speakers since they are low on my priority list of upgrades, and I'm currently saving every extra penny I can to build up my savings for other non-vehicle related priorities. I discovered today that my box with an 8" Punch Stage 2 and my Sony amp will fit perfectly under my rear seat. Nothing big, but it sounds good. My question is: can I hook this up to my stock stereo? It has a CD/tape head unit with no Onstar. If this is possible, what do I need to hook everything up? Would I need special adapters or harnesses? I'm definitely a beginner as far as all of this stuff goes, so describe things as simplistically as possible! Thanks!