Peterbilt 375 License Plate Bulb Size

The Peterbilt 375 license plate utilizes bulb sizes 67 and 97 for the lighting components located at the rear of the vehicle. Available information covers the production span from 1987 through 1996 for the specified truck and light assembly.

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
1987-1996	67
1987-1996	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 375 license plate bulb specifications cover the 1987-1996 model years, with two possible bulb sizes listed for each year in that range.
Both the 67 and 97 are ANSI-standardized single-filament bulbs sharing the BA15s bayonet base, which is a single-contact base with a 15mm barrel and a single locating pin.
The 67 bulb operates at 12V and 8W, while the 97 operates at 12V and 13W, making the 97 a higher-wattage variant within the same base family.
Both bulbs are described as variants of the 1156, a widely used automotive bulb type, though the 67 and 97 are lower-wattage members of that family rather than direct equivalents.
The 67 bulb applies to all Peterbilt 375 model years in the 1987-1996 range on vehicles without halogen capsule headlamps.
The 97 bulb applies exclusively to Peterbilt 375 vehicles equipped with halogen capsule headlamps, a fitment condition that holds across the entire 1987-1996 range.
Because the 67 and 97 share the same BA15s base, physical installation is possible with either bulb, but the wattage difference means they are not interchangeable without accounting for the electrical load difference.
The halogen capsule headlamp condition is the sole fitment variable that determines which of the two bulb sizes is specified for any given vehicle in this range.