Would the following radio be a plug and play exercise into my 2003 GTP (with steering wheel controls)? I presently have the Bose CD radio system with just the treble and base on the head unit, and the amp in the trunk. 94-03 Pontiac Firebird Sunfire Trans Am Grand Prix Grand Am Radio Cd 09390772 | eBay Then.... could I add the unit that allows me to hook up an IPod utilizing the "AUX" button on the deck ( I do NOT have a 6 disc changer)?