GMC C7000 Tail Light Bulb Size
The GMC C7000 tail light utilizes 1157 and 2057 bulb sizes for illumination across the various lighting assemblies. Available information covers the production span from 1979 through 1990 for the specified vehicle components.
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 |
|---|---|
| 1985-1990 | 1157 |
| 1984 | 2057 (Medium Duty) |
| 1157 (Tiltmaster) | |
| 1983 | 2057 (Medium Duty) |
| 1981-1982 | 1157 (Medium Duty) |
| 1979-1980 | 1157 |
Bulb Specifications
| Description | Bulb Size |
|---|---|
| ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base. 12V, 21W/5W. | 1157 |
| ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base. Brighter variant of 1157. 12V, 26.9W/8W. | 2057 |