GMC R3500 Side Marker Bulb Size
The GMC R3500 front side marker bulb uses 194 and 168 size bulbs for replacement applications. The chart covers vehicle production years spanning 1987 to 1991 with corresponding bulb size specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
Front Side Marker
| Years | Bulb Size |
|---|---|
| 1990-1991 | 194 (With Halogen Capsule Headlamps) |
| 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 |