2011-2014 For GMC Sierra 3500 HD. 2011-2014 For GMC Sierra 2500 HD. 2007-2013 For GMC Sierra 1500. 2011-2014 For Chevrolet Silverado 3500 HD. 2011-2014 For Chevrolet Silverado 2500 HD. Its soft rubber coating ensures long-lasting protection for the wiring harness, preventing aging.
