I am wanting to update the Head unit on my 2011 Pro4X to a full double DIN multi media unit. I am held back tho because I do not fully understand how an aftermarket head unit will work with th stock Rockfor Fosgate system that came with my truck? Can I plug and play a new aftermarket head unit into the stock system and expect the system to perform as it has with the stock unit? Sorry for the dumb questions... Appreciate the help from these forum members.