GMC S15 Jimmy License Plate Bulb Size

The GMC S15 Jimmy license plate light requires 194 and 67 bulb sizes for proper illumination. Data for the provided specifications covers the period from 1983 through 1991.

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
1987-1991	194
1986	67
1984-1985	194
1983	67

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 3.78W.	194
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. Lower wattage variant of 1156. 12V, 8W.	67

Other Locations

Additional Notes

The GMC S15 Jimmy uses two distinct bulb types across its license plate lighting specifications: the 194 and the 67, both conforming to ANSI standards recognized in the United States and Canada.
The 194 is a T10 miniature wedge bulb rated at 12V and 3.78W. Its wedge base design means it is held in place by the socket itself rather than by a separate locking mechanism.
The 67 is a single-filament bulb with a BA15s bayonet base, rated at 12V and 8W. The BA15s base requires an insertion-and-twist motion to seat and lock the bulb into its socket.
At 8W, the 67 draws more than twice the wattage of the 194 at 3.78W. The two bulbs are electrically and physically incompatible due to their different base types and power draws.
The GMC S15 Jimmy uses the 194 bulb for the license plate light across the 1984-1985 and 1987-1991 model years.
The 67 bulb applies to the 1983 and 1986 model years of the S15 Jimmy, making it the less frequently specified of the two bulb types in this application.
Because the 194 uses a wedge base and the 67 uses a BA15s bayonet base, the two bulbs are not interchangeable regardless of voltage compatibility.