Used 2012 GMC Sierra 1500 SLE Used 2012 GMC Sierra 1500 SLE Used 2012 GMC Sierra 1500 SLE Used 2012 GMC Sierra 1500 SLE Used 2012 GMC Sierra 1500 SLE Used 2012 GMC Sierra 1500 SLE Used 2012 GMC Sierra 1500 SLE Used 2012 GMC Sierra 1500 SLE Used 2012 GMC Sierra 1500 SLE Used 2012 GMC Sierra 1500 SLE Used 2012 GMC Sierra 1500 SLE Used 2012 GMC Sierra 1500 SLE Used 2012 GMC Sierra 1500 SLE Used 2012 GMC Sierra 1500 SLE Used 2012 GMC Sierra 1500 SLE Used 2012 GMC Sierra 1500 SLE Used 2012 GMC Sierra 1500 SLE Used 2012 GMC Sierra 1500 SLE Used 2012 GMC Sierra 1500 SLE