Wheelhouse Panel is a direct fit for the following:

2007-2013 GMC Sierra 1500
2007 GMC Sierra 1500 Classic
2007 GMC Sierra 1500 HD Classic
2007-2013 GMC Sierra 2500 HD
2007 GMC Sierra 2500 HD Classic
2007 GMC Sierra 3500 Classic
2007-2013 GMC Sierra 3500 HD

Genuine GM Part Number: 19166677