2003 - 2004 - 2005 Chevy & GMC Radio. Trucks, S10 Blazer, Jimmy, Vans, S10, S15, Sonoma & More! AM FM Cassette CD Player with Aux Input For use with Android, iPhone, iPod, MP3 Players, Satellite Radio & More! Part Number: 15104156. Compatible Part Numbers: 10356164, 15184933, 15198701, 15756190. Option Code: UB1 ** 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. ** This is for a Chevrolet truck, S10 and van factory OEM AM FM CD Cassette Player Radio that has been upgraded with an auxiliary input for use with Android Phones, MP3 Players, iPod, iPhone, Satellite Radio and more! You will not lose any functionality when the auxiliary input is in use and the radio will have all factory OEM features! 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. Tired of listening to static over your FM modulated satellite radio? 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. This radio will need unlocked by a GM dealer upon installation. Appearance is great as pictured, function is perfect! It features AM FM, a CD Player and Auxiliary Input for use with iPod, iPhone, Android, Satellite Radio, MP3 Players and more!