2003 - 2004 - 2005 - 2006 - 2007 Chevy GMC Silverado, Colorado, Express Van, Canyon, Sierra, and Savana AM FM Radio Upgraded with an Auxiliary Input. For use with iPod, iPhone, MP3 Players, Satellite Radio & More! Part Number: 15131157. Compatible Part Numbers: 15198093 / 25916154 / 15756185. Option Code: UM7 *This radio requires dealer turn-on but is able to be put into a fully functioning test mode for 10 minutes at a time 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. If you have any questions, feel free to give us a call. * This is for a Chevrolet GMC truck and van factory OEM AM FM Radio that has been upgraded with an Auxiliary 3.5mm input for use with iPhone, iPod, MP3 Players, Satellite Radio, Android Phones and more! You will not lose any functionality when the auxiliary input is in use and the radio will have all factory OEM features! Please confirm that this is the radio your vehicle requires as some of these vehicles used more than one style of radio. Feel free to give us a call with compatibility questions. Operation of the iPod jack is a snap. Just plug your accessory in and you will be listening to it through all of your car speakers. Just plug it right in and listen to satellite radio the way it is supposed to sound! Use the volume control on the radio as you usually would. It is the same with the bass, treble, fader, and balance. Press the clock button and you have clock display. There is no compromise on the audio going into the jack as it is running straight into the amp. Please Note: This radio will need unlocked by a GM dealer upon installation. **Please note that this is for the radio only and does not include the iPhone in the picture which is used for demonstration purposes only. ** ¡El soporte en español está disponible a través de mensajes! Haga clic en ''Ver información del vendedor'' y luego en ''Contactar con el vendedor'' para enviarnos un mensaje.