Pontiac GTO License Plate Bulb Size

Additional Notes

• The bulb 168 is the most frequently specified size across the Pontiac GTO license plate bulb data, covering the 2004-2006 model years. It is an ANSI-standard miniature wedge bulb in the T10 form factor, rated at 12V and 4.9W.
• The T10 wedge form factor appears in two distinct bulb sizes within these specifications: the 168 at 4.9W and the 194 at 3.78W. Although both share the same base type and voltage rating, they are not the same wattage and are not listed as interchangeable with each other.
• The bulb 67 is specified for the Pontiac GTO across the 1965-1969 model years, representing the longest consecutive span of any single bulb size in these specifications. It uses a BA15s bayonet base, operates at 12V, and draws 8W.
• The bulbs 67, 97, and 1155 all share the BA15s single-contact bayonet base and 12V operating voltage, yet their wattage ratings differ substantially at 8W, 13W, and 21W respectively. Each is described as a variant of the 1156 bulb family.
• Because the 67, 97, and 1155 bulbs differ in wattage despite sharing the same base type, substituting one for another in a given model year application would result in a mismatch in light output and power draw.
• The 1964 Pontiac GTO is the only model year in these specifications requiring the 1155 bulb, which carries the highest wattage of any bulb listed here at 21W.
• The 1971-1972 model years share the bulb 97, rated at 13W, which places their power draw between the lower 8W of the 67 used in earlier years and the higher 21W of the 1155 used in 1964.
• The 1973 model year is specified with the 194 bulb, a T10 wedge type rated at 3.78W, which is a lower wattage than the 168 wedge bulb used in the 2004-2006 years despite both sharing the same base form factor.