Hey there, I have a 98 5.9L Limited and the stock speakers are seperating from the housing, so I would like to replace them with aftermarket ones. I have the info on the wiring diagram for the stock amp, but I'm a little confused on how many channels, what impendence the amp offers (4 or 2 ohm), and wether there are crossovers for the door speakers and das tweaters. My overall goal is to replace the front door and dash speakers, rear door speakers, and leave the sound bar the way it is. I eventually would like to add a 12" sub and amp in extension of the stock amp. Please, any help would be greatly appreciated.