OER Parts offers a wide selection of Body Components for your 1978 GMC Truck. OER Parts offers 1978 GMC Truck Trunk Components, 1978 GMC Truck Interior Panels, 1978 GMC Truck Latches and Hinges, 1978 GMC Truck Partitions, 1978 GMC Truck Spare Tire & Jack Accessories, 1978 GMC Truck Spatter Paints, 1978 GMC Truck Trunk Insulation, 1978 GMC Truck Spare Tire and Parts, 1978 GMC Truck Trunk Lock & Key, and 1978 GMC Truck Trunk Mats & Carpets.