GMC C25 Brake Bulb Size
GMC C25 brake bulb specifications include 198 and 1034 bulb sizes for replacement applications. The replacement chart covers vehicle production from 1967 to 1978 with corresponding bulb size data.
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 Type | Shop |
|---|---|---|
| 1969-1978 | 198 | Check Price |
| 1967-1968 | 1034 | Check Price |
Bulb Specifications
| Description | Type | Shop |
|---|---|---|
| ANSI standard (US & Canada). Miniature wedge bulb (T5). 12V, 2W. | 198 | Check Price |
| ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base. Variant of 1157. 12V, 21/5W. | 1034 | Check Price |