2011 Nissan Maxima AM FM XM mp3 CD Control Panel. Part Number: 20878046. Radio Not Included. This is for a GMC Terrain AM FM XM mp3 CD Control Panel. This control panel has been cleaned, serviced as needed and thoroughly checked. Appearance is as pictured, function is perfect! This control panel is being sold as a REPLACEMENT ONLY! The part number for this control panel is 20878046. 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.