Wire harness and antenna adapter for installing an aftermarket radio. Wire harness only works with standard non-premium amp factory systems- Not compatible with amp systems like Bose, Infinity, etc.- Red ignition wire of the new radio has to be run separately from the vehicle radio harness (factory radio plug has no ignition power wire). Will not retain some features like warning chimes, steering audio controls, Onstar, etc. Compatible vehicles: No external factory amp vehicles: Made for Chevrolet: 2005-2006 Cobalt, 2005-2006 Equinox, 2004-2007 Malibu and Malibu Maxx; Made for Pontiac: 2005-2008 G6, 2006 Torrent