GMC K25 Instrument Panel Bulb Size
The GMC K25 instrument panel requires 3 distinct bulb sizes: 168, 1816, and 1445, with each size serving specific illumination functions within the dashboard assembly. The replacement chart documents bulb specifications across the 1967 to 1978 production range for this vehicle model.
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
If US Type and EU Type show the same value, a direct cross-reference for this bulb is not available or the data is insufficient.
| Years | US Type | EU Type | Shop |
|---|---|---|---|
| 1978 | 168 | W5W | Check Price |
| 1975-1977 | 1816 | 1816 | Check Price |
| 1974 | 1445 | 1445 | Check Price |
| 1972 | 168 | W5W | Check Price |
| 1970-1971 | 1445 | 1445 | Check Price |
| 1969 | 161 | 161 | Check Price |
| 1968 | 57 | 57 | Check Price |
| 1967 | 53 | 53 | Check Price |
Bulb Specifications
| Description | Type | Shop |
|---|---|---|
| ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 4.9W. | 168 | Check Price |
| ECE standard (Europe & worldwide). Single-filament signalling bulb with W2.1x9.5d wedge base. 12V, 5W. | W5W | Check Price |
| ANSI standard (US & Canada). Miniature wedge bulb (T3.25). 12V, 4W. | 1816 | Check Price |
| ANSI standard (US & Canada). Single-filament bulb with BA9s base. 12V, 2W. | 1445 | Check Price |
| ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 1W. | 161 | Check Price |
| ANSI standard (US & Canada). Single-filament bulb with BA9s base. 12V, 1W. | 57 | Check Price |
| ANSI standard (US & Canada). Single-filament bulb with BA9s base. 12V, 2W. | 53 | Check Price |