2004 2005 Cadillac SRX, CTS, AM FM Radio CD Player. Code Required. Dealer Turn On Required. Part Number: 15144091. Option Code: U2R. Code not included. This radio will need to be unlocked by a Cadillac dealer and paired to your vehicle. See below for details. This is for a Cadillac SRX, CTS AM FM Radio CD Player. This radio has been cleaned, upgraded, serviced as needed and thoroughly checked. Condition is decent with the upper left tab missing from the top of the radio. There are scratches underneath the Band button and Seek button. Also there is paint wear to the right of the Tune/Sel button with general wear on the face. See pictures for more details. Function is perfect! This radio is being sold as a REPLACEMENT ONLY! The part number for this radio is 15144091. 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, contact us with your VIN and we 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.