Peterbilt 387 License Plate Bulb Size

The Peterbilt 387 license plate light requires a single bulb size 67 for proper illumination of the rear vehicle identification area. Available data for the specified component covers the period from 2000 to 2009.

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
2000-2009	67

Bulb Specifications

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

Other Locations

Additional Notes

The bulb size 67 is an ANSI-standardized type recognized across both the United States and Canada, meaning it conforms to a shared North American specification rather than a regional or proprietary standard.
The Peterbilt 387 uses the 67 bulb for its license plate position across the 2000-2009 model years, with no variation in this specification throughout that entire production span.
The 67 bulb operates on a 12-volt electrical system and draws 8 watts, placing it in the lower end of the power range for incandescent automotive bulbs.
It is a single-filament bulb, meaning it serves only one lighting function rather than switching between two brightness levels as a dual-filament bulb would.
The 67 uses a BA15s bayonet base, which is a single-contact bayonet mount. The "s" in BA15s denotes a single contact point at the base, as opposed to the dual-contact BA15d found on some other bulb types.
The 67 is described as a lower wattage variant of the 1156. Both share the BA15s bayonet base and single-filament design, but the 1156 operates at a higher wattage of approximately 26.9 watts, making the two types electrically incompatible as direct substitutes despite their physical similarities.