Pontiac Star Chief License Plate Bulb Size

Additional Notes

• The bulb 67 is the most frequently specified license plate bulb for the Pontiac Star Chief, covering model years 1955-1963 and 1965-1966.
• The 67 bulb follows the ANSI standard applicable in both the US and Canada, operating at 12V and 8W with a single filament and a BA15s bayonet base.
• The 67 bulb is a lower-wattage variant of the 1156, drawing 8W compared to the higher output of that reference bulb.
• The 1964 Star Chief departs from the 67 specification, requiring instead the 1155 bulb for the license plate position.
• The 1155 bulb shares the same BA15s bayonet base and single-filament construction as the 67, but operates at a significantly higher wattage of 21W at 12V.
• Despite the shared BA15s base between the 67 and 1155, their wattage difference of 13W means the two bulbs are not interchangeable without affecting electrical load and light output.
• The 1954 Star Chief uses the 63 bulb, which differs from all other listed model years in both base type and power draw.
• The 63 bulb uses a BA9s base rather than the BA15s found on the 67 and 1155, making it physically incompatible with sockets designed for those bulbs.
• At 0.63W, the 63 bulb operates at a substantially lower power level than either the 67 or 1155, reflecting its distinct application and socket design.
• All three bulb types specified across the Star Chief lineup conform to ANSI standards recognized in both the US and Canada.