GMC 370 Parking Light Bulb Size
The GMC 370 parking light requires bulb sizes 63 and 67 for the lighting components. Available data covers the period from 1951 through 1959 for the specified vehicle.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
Bulb Size by Year Range
| Years | Bulb Size |
|---|---|
| 1956-1959 | 67 |
| 1951-1955 | 63 |
Bulb Specifications
| Description | Bulb Size |
|---|---|
| ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. Lower wattage variant of 1156. 12V, 8W. | 67 |
| ANSI standard (US & Canada). Single-filament bulb with BA9s base. 12V, 0.63W. | 63 |