GM greased me for labor $130 to diagnose the problem. It’s the HMI module that all the wires connect to behind the glovebox. It’s going to cost an additional 1200 to fix it. $800 for the new module and then labor. You can’t get one and do it yourself because it has to be coded by the dealer to your vin. Otherwise it is useless per the dealership. It is only warranties for 2 years and this occurrence is so common the part is back ordered. GM would not order me a new one without full payment first. The only other option is to go with an alpine aftermarket system but none the wiring harnesses fit and requires some engineering. Further they wouldn’t tell me if the OnStar would work. Kind of a sleazy way to make money Chevy/ GM. What ever happened to making things GM tough and standing behind the quality of your products?