just bought the truck and it had the factory radio. im putting in my alpine hu but cant get it to work. ive read that on some of the newer silverados they take a seperate modular to keep all the door chimes and stuff working right but i was also told if i open my doors and the chime doesnt comes from the speakers i dont need that modular. which mine doesnt so i dont think i need the modualr deal. is there something else i dont know about to get this thing working?
