Peterbilt 372 License Plate Bulb Size

The Peterbilt 372 license plate light uses 67 and 97 bulb sizes for the exterior lighting components located at the rear of the heavy duty commercial vehicle. Available information covers the production span from 1989 to 1995 for the specific lighting requirements listed in the provided data set.

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
1989-1995	67
1989-1995	97 (With Halogen Capsule Headlamps)

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 BA15s bayonet base. Variant of 1156. 12V, 13W.	97

Other Locations

Additional Notes

The Peterbilt 372 uses two distinct license plate bulb sizes across its 1989-1995 model years, with fitment determined by headlamp configuration rather than model year alone.
The bulb 67 is an ANSI-standard, single-filament bulb rated at 12V and 8W, fitted with a BA15s bayonet base, and is classified as a lower wattage variant of the 1156 bulb family.
The bulb 97 shares the same ANSI-standard single-filament design and BA15s bayonet base as the 67, but operates at a higher wattage of 13W at 12V, also within the 1156 family.
The BA15s bayonet base is a single-contact base type, meaning both the 67 and 97 are physically similar in their mounting interface despite differing in wattage output.
On the Peterbilt 372, the 67 bulb applies to the standard headlamp configuration, while the 97 bulb applies specifically to vehicles equipped with Halogen Capsule Headlamps.
The headlamp type present on a given vehicle is the determining factor for license plate bulb selection, as both sizes were available across every model year from 1989 through 1995 without variation.
Because the 67 and 97 share the same BA15s bayonet base, physical installation is mechanically possible with either bulb regardless of the intended fitment, which makes headlamp configuration verification a necessary step before selecting a replacement.
The wattage difference between the 67 (8W) and the 97 (13W) means the two bulbs are not electrically interchangeable, as substituting one for the other would alter the current draw in the license plate lamp circuit.