GMC K2500 Back Up Light Bulb Size
The GMC K2500 back up light utilizes bulb sizes 1156, 2356, 2456, 3156, and P21W depending on the specific application. Available information covers the range from 1979 through 2000.
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 |
|---|---|---|---|
| 2000 | 2456 | 2456 | Check Price |
| 1999 | 3156 | P27W | Check Price |
| 1998 | 2456 | 2456 | Check Price |
| 1993-1997 | 1156 | P21W | Check Price |
| 1992 | 2356 | 2356 | Check Price |
| 1991 | 2456 | 2456 | Check Price |
| 1990 | 3156 | P27W | Check Price |
| 1988-1989 | 1156 | P21W | Check Price |
| 1979-1986 | 1156 | P21W | Check Price |
Bulb Specifications
| Description | Type | Shop |
|---|---|---|
| ANSI standard (US & Canada). Festoon bulb, specialty application. 12V. | 2456 | Check Price |
| ANSI standard (US & Canada). Single-filament wedge bulb (T25). 12V, 27W. | 3156 | Check Price |
| 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). Dual-filament bulb with BAY15d bayonet base. 12V. | 2356 | Check Price |