Chevrolet R/V Series License Plate Bulb Size

The Chevrolet R/V Series license plate bulb utilizes 2 distinct sizes: 194 and 67, with each bulb size corresponding to specific vehicle configurations. The replacement chart covers 1987 through 1991 model years and documents the bulb specifications for each production year within that range.

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
1988-1991	194
1987	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

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Additional Notes

The Chevrolet R/V Series uses two distinct bulb types across its license plate fitments: the 194 and the 67, both conforming to ANSI standards recognized in the United States and Canada.
The 194 bulb is a T10 miniature wedge type, operating at 12 volts and drawing 3.78 watts. Its wedge base design means it is retained by socket tension alone, with no separate locking mechanism.
The 67 bulb uses a BA15s single-contact bayonet base and operates at 12 volts with an 8-watt draw. The BA15s designation indicates a single-contact base with a 15mm collar, requiring a twist-lock installation rather than a direct push-in fit.
The 67 bulb is a lower-wattage variant of the 1156. Despite the shared bayonet base type, the wattage difference means the two are not electrically equivalent, and substituting one for the other may affect circuit load.
The Chevrolet R/V Series (1988-1991) uses the 194 bulb for the license plate position, while the 1987 model year uses the 67 bulb. These two bulb types have physically incompatible bases, making them non-interchangeable without socket modification.
The shift from the 67 bayonet-base bulb in 1987 to the 194 wedge-base bulb from 1988 onward reflects a change in socket type between those model years, meaning parts sourced from a 1987 vehicle are not directly transferable to 1988-1991 units for this position.
At 3.78 watts, the 194 draws notably less power than the 8-watt 67, placing them in different load categories despite both serving the same license plate illumination function on this vehicle line.