GMC C15 Suburban Side Marker Bulb Size
The GMC C15 Suburban front side marker bulb uses either a 168 or 194 size bulb depending on the specific model variant. The replacement chart covers vehicle production spanning 1973 to 1978 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 |
|---|---|
| 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 |