OER Parts offers a wide selection of Body Components for your 1990 GMC R3500. OER Parts offers 1990 GMC R3500 Trunk Components, 1990 GMC R3500 Interior Panels, 1990 GMC R3500 Latches and Hinges, 1990 GMC R3500 Partitions, 1990 GMC R3500 Spare Tire & Jack Accessories, 1990 GMC R3500 Spatter Paints, 1990 GMC R3500 Trunk Insulation, 1990 GMC R3500 Spare Tire and Parts, 1990 GMC R3500 Trunk Lock & Key, and 1990 GMC R3500 Trunk Mats & Carpets.