OER Parts offers a wide selection of Dress Up Kits for your 1940 GMC Truck. OER Parts offers 1940 GMC Truck Valve Covers, 1940 GMC Truck Exhaust Manifolds, 1940 GMC Truck Intake Manifolds, 1940 GMC Truck Timing Covers, 1940 GMC Truck Water Pumps, 1940 GMC Truck Oil Pans, 1940 GMC Truck Custom Under Hood Mirrors, 1940 GMC Truck Radiator Support Show Panel, and more...