OER Parts offers a wide selection of Dash Components for your 1939 GMC Truck. OER Parts offers 1939 GMC Truck Clusters, 1939 GMC Truck Instrument Cluster Case, 1939 GMC Truck L.E.D. Indicator Wiring Set, 1939 GMC Truck Instrument Cluster LED Upgrade Set, 1939 GMC Truck Cluster Assembly, 1939 GMC Truck Dash Instrument Bulb Socket , 1939 GMC Truck Digital Instrument Cluster, 1939 GMC Truck Instrument Cluster Seal Kit, and 1939 GMC Truck Instrument Gauge Decals.