OER Parts offers a wide selection of Dress Up Kits for your 1939 GMC Truck. OER Parts offers 1939 GMC Truck Valve Covers, 1939 GMC Truck Exhaust Manifolds, 1939 GMC Truck Intake Manifolds, 1939 GMC Truck Timing Covers, 1939 GMC Truck Water Pumps, 1939 GMC Truck Oil Pans, 1939 GMC Truck Custom Under Hood Mirrors, 1939 GMC Truck Radiator Support Show Panel, and more...