GMC P4500 Tail Light Bulb Size
The GMC P4500 tail light requires a 1157 bulb size for proper illumination and function. Available information covers the specific range from 1979 through 1990 for the specified vehicle.
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 |
|---|---|
| 1979-1990 | 1157 (Medium Duty) |
Bulb Specifications
| Description | Bulb Size |
|---|---|
| ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base. 12V, 21W/5W. | 1157 |