Compatible with Chevrolet— 2003-2007 Silverado 1500/2500 HD, 2003 Silverado 1500 HD, 2003-2004 Silverado 2500, 2003-2006 Silverado 3500, 2004-2006 Tahoe, 2005-2006 Silverado 1500 HD, 2007 Silverado 1500 Classic/1500, 2003-2006 Avalanche 1500 2500, HD Classic/2500 HD Classic/3500 Classic/3500 HD, Compatible with GMC— 2003-2007 Sierra 1500/2500 HD, 2003 Sierra 1500 HD, 2003-2004 Sierra 2500, 2003-2006 Sierra 3500, 2005-2006 Sierra 1500 HD, 2007 Sierra 1500 Classic/1500 HD Classic/2500 HD Classic/3500 Classic/3500 HD, 2004-2006 Yukon Compatible with— 2004-2006 Cadillac Escalade / 2003-2006 Cadillac Escalade EXT Function— Choose Which Lights Stay On with High Beams – Mix Fog Lights, DRLs, and Low Beams Individually. Switch Between 6 or 8 Lights Activation for Different Scenarios 1 Year Warranty is Provided. 6 High Mod ＆ 8 high Mod