I know I had to use the module for the Onstar and Bose system but I don't know about the Chime-X. I installed everytihng besides the radio (amp, sub box, bluetooth, camera.). I was really hoping for better news. Maybe someone else has more information on this....
Question though, do you have steering wheel controls? If so, were you able to get them to work? I bought two modules and neither would program.