OER Parts offers a wide selection of Dash Components for your 1966 GMC Truck. OER Parts offers 1966 GMC Truck Clusters, 1966 GMC Truck Instrument Cluster Case, 1966 GMC Truck L.E.D. Indicator Wiring Set, 1966 GMC Truck Instrument Cluster LED Upgrade Set, 1966 GMC Truck Cluster Assembly, 1966 GMC Truck Dash Instrument Bulb Socket , 1966 GMC Truck Digital Instrument Cluster, 1966 GMC Truck Instrument Cluster Seal Kit, and 1966 GMC Truck Instrument Gauge Decals.