GMC C25 Suburban Instrument Panel Bulb Size
The GMC C25 Suburban instrument panel utilizes 3 distinct bulb sizes: 1816, 1445, and 168, with each size serving specific dashboard illumination functions. The replacement chart documents bulb specifications across the 1967 to 1978 production range.
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 |
|---|---|
| 1976-1978 | 1816 |
| 1974-1975 | 1445 |
| 1970-1972 | 168 |
| 1969 | 1445 |
| 1968 | 53 |
| 1967 | 57 |
Bulb Specifications
| Description | Bulb Size |
|---|---|
| ANSI standard (US & Canada). Miniature wedge bulb (T3.25). 12V, 4W. | 1816 |
| ANSI standard (US & Canada). Single-filament bulb with BA9s base. 12V, 2W. | 1445 |
| ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 4.9W. | 168 |
| ANSI standard (US & Canada). Single-filament bulb with BA9s base. 12V, 2W. | 53 |
| ANSI standard (US & Canada). Single-filament bulb with BA9s base. 12V, 1W. | 57 |