GMC W4500 Forward Back Up Light Bulb Size
The GMC W4500 Forward back up light uses 1156 and 1073 bulb sizes for the rear illumination components. Data for the specified vehicle covers the range from 1992 through 2001.
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
If US Type and EU Type show the same value, a direct cross-reference for this bulb is not available or the data is insufficient.
| Years | US Type | EU Type | Shop |
|---|---|---|---|
| 1997-2001 | 1156 (Tiltmaster) | P21W | Check Price |
| 1996 | 1073 (Tiltmaster) | 1073 | Check Price |
| 1995 | 1156 (Tiltmaster) | P21W | Check Price |
| 1994 | 1073 (Tiltmaster) | 1073 | Check Price |
| 1993 | 1156 (Tiltmaster) | P21W | Check Price |
| 1992 | 1156 | P21W | Check Price |
Bulb Specifications
| Description | Type | Shop |
|---|---|---|
| ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. 12V, 21W. | 1156 | Check Price |
| ECE standard (Europe & worldwide). Single-filament signalling bulb with BA15s bayonet base. 12V, 21W. | P21W | Check Price |
| ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. Lower wattage variant of 1156. 12V, 13W. | 1073 | Check Price |