OER Parts offers a wide selection of Cooling System Components for your 1973 GMC Truck. OER Parts offers 1973 GMC Truck Shroud Hardware, 1973 GMC Truck Shroud Mounting Kit, 1973 GMC Truck Lower Radiator Fan Shroud Clip, 1973 GMC Truck Upper Fan Shroud Bracket, 1973 GMC Truck Lower Fan Shroud Bracket, and 1973 GMC Truck Fan Shroud Flange Nuts.