GMC R3500 Seat Belt Warning Bulb Size
The GMC R3500 seat belt warning light utilizes 194 and 168 bulb sizes for the internal illumination components. Data for the specific lighting requirements covers the period from 1987 through 1991.
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 |
|---|---|
| 1988-1991 | 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 |