Buick Radio AM FM Single Disc CD Player Part Number: 5490755. This radio will need to be unlocked by a GM dealer and paired to your vehicle. See below for details. This is for a Buick factory OEM AM FM Single CD player radio. Part number 5490755 with option code U1C. Upon installation, you will need to take it to a dealer to be unlocked and paired with your vehicle. You will not lose any functionality and the radio will have all factory OEM features! This radio has been cleaned, serviced as needed and thoroughly double-checked. *** Please Note: This radio requires dealer turn-on upon installation. Any GM dealer can unlock the radio and it is literally a 5 minute process. Most dealers charge anywhere from $75 to $100 but some will do it free of charge if you have a good relationship with them. Please make plans before purchase. *** This radio is being sold as a REPLACEMENT ONLY! If you do not have this exact part number currently in your vehicle it will likely NOT WORK. If you are unsure of your part number give a GM dealer a call with your VIN and they should be able to provide you with the correct part number. They may look the same and have the same plugs but data streams may be different not allowing them to code. For example external amps are used in some cars and will not allow interchange, etc.