2015 2016 Chevrolet Express 2500, 3500 GMC Savana 2500 3500. AM FM Radio with Auxiliary Input. Part Number: 23475277. Option Code UOF. This is for a Chevrolet Express, GMC Savana AM FM Radio mp3 with an auxiliary input. This radio has been cleaned, serviced as needed and thoroughly checked. Appearance is fair. See pictures for more details. Function is perfect! Blems: Light scratches on the display lens, paint wear on the power button. This radio is being sold as a REPLACEMENT ONLY! The part number is 23475277. 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.