NOTE: NOT COMPATIBLE WITH AMP SYSTEMS LIKE BOSE, INFINITY, etc.; Red wiring is not for all models, but if the OEM radio harness of your vehicle does not have an ignition wire, the aftermarket stereo cannot be turned off and on through the OEM radio harness. To solve this problem, you need to get a 12v power supply from the ignition by running the red cable separately from the factory radio harness | Fitment list: compatible with GMC Sierra 2003-2007 , GMC Canyon 2004-2012 , GMC Envoy 2007-2009, GMC Envoy 2002-2006, GMC Savana 2003-2007 Full Size Van RED WOLF, GMC Yukon / Yukon XL 2003-2006 | Compatibility list: replacement for Chevrolet: Avalanche 2003-2006, Cavalier 2000-2005, Colorado 2004-2012, 2001-2002 Express Van, Impala 2000-2005, Malibu 2004-2005 Classic Models ONLY, Malibu 2000-2003, Monte Carlo 2000-2005 , Silverado 2007 Classic Models ONLY, Silverado 2003-2006, SSR 2003-2006, Suburban 2003-2006, Tahoe 2003-2006 Non-Bose, Trailblazer 2002-2009, Uplander 2005-2008 , 2000 - 2005 Venture Van, 2002 - 2005 Blazer, 2005 - 2009 Corvette | Easy to install: Without cutting any OEM wire harness | Premium quality: Professional pure copper core made, which keeps excellent conductivity and safe use. RED WOLF car radio stereo harness is used to replace factory or broken stereo harness