Product Features: *Interface designed to allow for the replacement of the OEM Radio with an aftermarket unit in non-amplified GM Vehicles *Retain full functionality of the OnStar system with adjustable volume output *Retains safety and warning chimes with adjustable level output *Retention of the Retained Accessory Power (RAP) convenience features *Required outputs for the installation of a navigation radio included *USB Update interface compatible** Compatible with the following vehicles: *Buick: 2004 - 2005 Century 2005 - 2008 LaCrosse 2004 - 2007 Rainer 2002 - 2007 Rendevous 2005 - 2008 Terraza *Chevrolet: 2003 - 2006 Avalanche 2001 - 2005 Cavalier 2004 - 2008 Colorado 2003 - 2007 Express 2000 - 2005 Impala 2001 - 2003 Malibu 2000 - 2005 Monte Carlo 2003 - 2006 Silverado 2003 - 2006 SSR 2003 - 2006 Suburban 2003 - 2006 Tahoe 2002 - 2008 Trailblazer 2005 - 2008 Uplander 2000 - 2005 Venture *GMC: 2004 - 2008 Canyon 2002 - 2008 Envoy 2003 - 2007 Savana 2003 - 2006 Sierra 2003 - 2006 Yukon/XL *Pontiac: 2001 - 2005 Aztec 2001 - 2005 Grand AM 2004 - 2008 Grand Prix 2000 - 2005 Montana 2000 - 2005 Sunfire