OER Parts offers a wide selection of Body Panels for your 1956 GMC Truck. OER Parts offers 1956 GMC Truck Floor Pans, 1956 GMC Truck Braces, 1956 GMC Truck Complete Floor Pans, 1956 GMC Truck Partial Floor Pans , 1956 GMC Truck Seat Frame Supports, 1956 GMC Truck Toe Board Panel, 1956 GMC Truck Shifter Tunnel Cover, and 1956 GMC Truck Floor Pan / Trunk Pan Plug.