Pontiac GTO Back Up Light Bulb Size
The Pontiac GTO back up light utilizes 1156, 1157, and P21W bulb sizes depending on the specific application requirements for the vehicle lighting system. Available data for the bulb sizes covers the historical span from 1964 through 2006 for the various configurations listed.
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 | US Type | EU Type | Shop |
|---|---|---|---|
| 2004-2006 | 1156 | P21W | Check Price |
| 1973 | 1157 | P21/5W | Check Price |
| 1972 | 1156 | P21W | Check Price |
| 1971 | 1157 | P21/5W | Check Price |
| 1964-1970 | 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). Dual-filament bulb with BAY15d bayonet base. 12V, 21W/5W. | 1157 | Check Price |
| ECE standard (Europe & worldwide). Dual-filament signalling bulb with BAY15d bayonet base. 12V, 21W/5W. | P21/5W | Check Price |