47-77 Chevy/GMC Dash Socket & Pigtail. Replacement lamp socket and pigtail works with a variety of GM applications. Socket fits is a 5/8" mounting hole and uses a G3/G4 6 or 12 volt bulb. Made of high quality heat resistant plastic with stamped steel bulb socket and contacts. Popular Applications:

47-66 GM Truck Dash Gauge Panel
54-59 GM Truck Ignition Switch
67-72 GM Truck Ignition Switch
55-59 GM Truck Deluxe Heater Control
67-72 GM Truck Heater & A/C Control
53-77 Corvette Instrument Panel
49-66 GM Passenger Car Instrument Panel (excluding 55' models)

47-77 Chevy Heater Control, Ignition Switch, Instrument Dash Panel Light Socket