i don't really know dude. All i know is IF you have to replace it, you need to buy a $80 piece that plugs into the radio. Apperently, GM made their vehicles brain sync with the radio. So if you put in a new radio, within a month, the brain could fry. I know this becuase my buddy was a idiot and cut out a piece and 3 weeks later, his lights didn't turn on, radio didn't turn on, car barely started, gauges worked once in a while. he got the piece and 2 weeks later everything was fine till the lights. He has yet to fix his Dash/Counsil lights. So just given a a heads up. And it's $80 at the place i get it. He's the cheapest around here. A chevy dealer wants $200. I couldn't tell ya why t stopped workin though. I hope someone else can give ya a answer. Mine is just incase you gotta replace it. Good Luck.