GMC General High Beam Indicator Bulb Size
The GMC General high beam indicator requires bulb size 158 or bulb size 194 depending on the specific application. Data for the bulb size covers the range from 1984 to 1988.
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 |
|---|---|
| 1988 | 158 (Tiltmaster) |
| 1987 | 194 (Tiltmaster) |
| 1984-1986 | 158 (Tiltmaster) |
Bulb Specifications
| Description | Bulb Size |
|---|---|
| ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 3W. | 158 |
| ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 3.78W. | 194 |