APPLICATION SUMMARY: 2001-2006 Chevrolet Silverado 2500 HD,2001-2004 Chevrolet Silverado 2500,2001-2006 Chevrolet Silverado 3500,2001-2014 Chevrolet Silverado 1500,2007-2007 Chevrolet Silverado 2500 HD Classic,2007-2007 Chevrolet Silverado 3500 Classic