GMC R2500 Turn Signal Indicator Bulb Size
The GMC R2500 turn signal indicator requires bulb size 194 or 168 depending on the specific application for the vehicle. Data for the bulb sizes covers the range from 1987 to 1989.
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 |
|---|---|
| 1988-1989 | 194 |
| 1987 | 168 |
Bulb Specifications
| Description | Bulb Size |
|---|---|
| ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 3.78W. | 194 |
| ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 4.9W. | 168 |