I replaced the stereo system - head unit, amps, speakers, etc. The stereo pops out easily if you have the right tools which your Chrysler dealer should have. I did everything BUT the actual removal of the stereo - the dealer had it out in 30 seconds, no charge.

Regarding plugging in a new stereo, check Crutchfield for an adaptor. I installed all new wiring so I can't help you there.