GMC C25 Suburban Side Marker Bulb Size
The GMC C25 Suburban front side marker bulb uses either 168 or 194 size bulbs depending on the specific model configuration. The replacement chart covers vehicle production spanning 1973 to 1978.
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 |
|---|---|
| 1974-1978 | 168 |
| 1973 | 194 |
Bulb Specifications
| Description | Bulb Size |
|---|---|
| ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 4.9W. | 168 |
| ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 3.78W. | 194 |