I have 2014 Chevy Volt. On star was working fine called about the mobile app not working after working work on technical support for 3 days The advanced AR with case number called and left a vice mail to get in care push the blue button and asked for him. I used on star in the car 3 hours before and working fine. After on star support finished review and code down load the On Star button is red and will nor work and dealer want $500 to fix it. Never ask On Star for any help the damage you car and expect you pay to get fixed to use the On star service you paying for. This is bad practice to damage a your car and the tell to take dealer to get fixed