I have a 2004 Chevy Colorado extended cab and I am going to be putting in components in the front doors, 3 1\2's in the dash, 6x9's and 6 1\2's in the back doors, four 12's and three amps as well as a double din in dash receiver. The deck will be pioneer and the speakers and amps will be Polk audio. I was also thinking about also putting in 4 inch screens in the rear doors.