Hello! Just bought a 99 grand prix gtp as my first car as a 20 year old. Thought i'd look for a forum to join for any problems, questions i had as this is what most people do with their cars. Wondering if anyone has ever changed the head unit in this model, it has the 6 speaker bose system with the amp underneath the trunk opening, I wanna get a new head unit and possibly speakers all around for it, wondering if its as simple as swapping or if running new wiring is necessary?!