HappyBlue connects your phone with your GM car. Together with the HappyBlue Adapter you can read nearly all data from your car. 1. ) "Cockpit" - see all data. 2. ) "Control" - control your car, open the windows, look the doors, etc. 3. ) "Fun" - light piano and much more. 4. ) "Maintenance" - read and clear all the manufacture fault codes (not only OBD) from your car.