I have a 2009 malibu LS but it was a fleet vehicle and has no xm or onstar. I am wanting to have RDS (radio data system) working and i do not think the radio i have is the digital one. I have found on ebay and 6 cd changer OEM radio for 129.99 they say its unlocked. I am wondering if anyone has come across this problem or knows anything about the unlocked radio and if it would just be a plug and play and still work with the door ajar chimes and security features?