2010-2013 GMC Sierra 1500 SL Fleetside 78.9 Bed; 2007-2009 GMC Sierra 1500 SLE Fleetside 78.7 Bed; 2010-2013 GMC Sierra 1500 SLE Fleetside 78.9 Bed; 2007-2009 GMC Sierra 1500 SLT Fleetside 78.7 Bed; 2010-2013 GMC Sierra 1500 SLT Fleetside 78.9 Bed;...