Add an Amp Adapter. Use this adapter to make your installation of an amplifier to the factory system faster with a cleaner install. For adding a bass amp for woofer/subwoofer. Adjustable gain output. Prevents cutting factory wiring. Provides rca output and a power wire for the remote amplifier turn on connection. Compatibility Notes: Not compatible with factory external amp stereo systems. Only works with factory non-amplified systems (no JBL/Synthesis, Bose, etc.). Connection is done at back of radio. Works with the following vehicles: No external factory amp vehicles: Made for Buick: 2004-2005 Century, 2005-2009 LaCrosse, 2004-2007 Rainier, 2002-2007 Rendezvous, 2005-2007 Terraza;; Made for Chevrolet: 2003-2006 Avalanche, 2000-2005 Cavalier, 2004-2012 Colorado, 2001-2007 Express, 2000-2005 Impala, 2003-2009 Kodiak, 2001-2003 Malibu, 2004-2005 Malibu Classic, 2000-2001 Metro, 2000-2005 Monte Carlo, 2000-2003 Prizm, 2003-2005 S10 Blazer, 2003-2004 S10 Pickup, 2003-2006 Silverado, 2007 Silverado Classic, 2003-2006 SSR, 2003-2006 Suburban, 2003-2006 Tahoe, 1998-2004 Tracker, 2002-2009 Trailblazer, 2005-2008 Uplander;; Made for GMC: 2004-2012 Canyon, 2002-2009 Envoy, 2001-2007 Savana, 2003-2006 Sierra, 2007 Sierra Classic, 2003-2004 Sonoma, 2003-2009 Topkick, 2003-2006 Yukon;; Made for Hummer: 2006-2010 H3;; Made for Isuzu: 2003-2008 Ascender;; Made for Pontiac: 2001-2005 Aztec, 2001-2005 Grand Am, 2004-2008 Grand Prix, 2000-2005 Montana, 2000-2005 Sunfire, 2003-2008 Vibe;; Made for Saab: 2005-2009 9-7x;; Made for Saturn: 2005-2007 Relay Add an Amp Adapter. Use this adapter to make your installation of an amplifier to the factory system faster with a cleaner install. For adding a bass amp for woofer/subwoofer. Adjustable gain output. Prevents cutting factory wiring. Provides rca output and a power wire for the remote amplifier turn on connection. Compatibility Notes: Not compatible with factory external amp stereo systems. Only works with factory non-amplified systems (no JBL/Synthesis, Bose, etc.). Connection is done at back of radio. Works with the following vehicles: No external factory amp vehicles: Made for Buick: 2004-2005 Century, 2005-2009 LaCrosse, 2004-2007 Rainier, 2002-2007 Rendezvous, 2005-2007 Terraza;; Made for Chevrolet: 2003-2006 Avalanche, 2000-2005 Cavalier, 2004-2012 Colorado, 2001-2007 Express, 2000-2005 Impala, 2003-2009 Kodiak, 2001-2003 Malibu, 2004-2005 Malibu Classic, 2000-2001 Metro, 2000-2005 Monte Carlo, 2000-2003 Prizm, 2003-2005 S10 Blazer, 2003-2004 S10 Pickup, 2003-2006 Silverado, 2007 Silverado Classic, 2003-2006 SSR, 2003-2006 Suburban, 2003-2006 Tahoe, 1998-2004 Tracker, 2002-2009 Trailblazer, 2005-2008 Uplander;; Made for GMC: 2004-2012 Canyon, 2002-2009 Envoy, 2001-2007 Savana, 2003-2006 Sierra, 2007 Sierra Classic, 2003-2004 Sonoma, 2003-2009 Topkick, 2003-2006 Yukon;; Made for Hummer: 2006-2010 H3;; Made for Isuzu: 2003-2008 Ascender;; Made for Pontiac: 2001-2005 Aztec, 2001-2005 Grand Am, 2004-2008 Grand Prix, 2000-2005 Montana, 2000-2005 Sunfire, 2003-2008 Vibe;; Made for Saab: 2005-2009 9-7x;; Made for Saturn: 2005-2007 Relay