GMC W7500 Forward License Plate Bulb Size

The GMC W7500 Forward license plate light requires a bulb size of 67 for the exterior lighting system on the rear of the vehicle. Data for the specified component covers the range from 1984 through 1996.

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
1985-1996	67 (Tiltmaster)
1984	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 GMC W7500 Forward uses the ANSI 67 bulb for the license plate position across all listed model years from 1984 to 1996.
The 67 bulb is a single-filament type with a BA15s bayonet base, operating at 12 volts and 8 watts.
The BA15s designation indicates a single-contact bayonet base with a 15mm collar, which is not interchangeable with dual-contact BA15d bases used in other bulb types.
The 67 bulb is a lower-wattage variant of the 1156, sharing the same BA15s base but drawing 8 watts compared to the 1156's 26.88 watts, making the two non-interchangeable in applications where wattage tolerance is a factor.
The 67 bulb conforms to ANSI standards recognized in both the United States and Canada.
Model years 1985-1996 of the GMC W7500 Forward carry the Tiltmaster designation alongside the 67 bulb specification, while the 1984 model year is listed without that designation.