Jan 13, 20162018-2020 Chevy Silverado Stereo Wiring Diagram. The wiring for the 2018 and 2019 Silverado can vary, depending on the level of your trim. If your Chevy Silverado has a 16-pin plug on the back of your stereo, you will need to follow this guide instead of the previous one. Silverado Stereo Constant 12V+ Wire: Red/Violet. Related searches for 2002 silverado stereo wiring diagram 2003 chevrolet silverado wiring diagram2003 silverado radio wiring harness2003 silverado wiring harness diagram2016 chevy silverado wiring diagramgm stereo wiring diagram2005 silverado speaker wiring2004 silverado radio wiring diagramchevy truck radio wiring diagram