I have a 2SS, I have an intermitent problem with the speedo also. It reads faster than I am actually going. I did take it back to the dealer, and they have ordered a new gauge cluster. problem is that the Camaro's are so new that the dealerships dont have the software for their diagnostic equipment to even look at them. I was told by my dealership that they are getting their programs updated this month. so looking into problemas will get easier as time goes on. Technology ita a wonderful thing.