This product can fit: 

2007 Sierra 2500, 3500
2008 Sierra 2500, 3500
2009 Sierra 2500, 3500
2010 Sierra 2500, 3500
2011 Sierra 2500, 3500
2012 Sierra 2500, 3500
2013 Sierra 2500, 3500
2014 Sierra 2500, 3500