The onstar system that is in the 97-03 style gps is outdated and will never work again because it uses the old analog Verizon Wireless system which has been offline for many years now, in order to get Onstar again you have to order the $100 mirror from Onstar. And to get the steering wheel controls back just buy that thing zzp sells. I have one and love it. http://shop.zzperformance.com/store/...Interface.aspx