This Preliminary Information communication provides information to the technician to help diagnose vehicles that may have a radio inoperative. This concern will last through multiple ignition cycles and is not intermittent. If Service Information diagnostics do not point to the Media Disc Player as being at fault, please continue with normal diagnostics. If SI diagnostics do point to the Media Disc Player being at fault, please do not unplug or remove power from the module or vehicle. Technician will contact General Motors Technical Assistance Center for further assistance.
