Compact Stereo Antenna Harness Adapter for Installing a New Radio Into a Chevrolet, Colorado, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 Antenna adapter for installing a new Radio into a CHEVROLET COLORADO 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 CarXtc adapter plugs directly into the antenna wire beyond the radio found in a COLORADO Plugs directly into your vehicle radio antenna harness behind the factory radio. Antenna adapter is needed for your CHEVROLET COLORADO 05, 06, 07, 08, 09, 10, 11, 12 If installing an FM modulator you will need this and the reverse antenna adapter