GMC 1500 Series Turn Signal Bulb Size
GMC 1500 Series front turn signal bulbs use 1156 or 1073 size, while rear turn signal bulbs use 1034 or 1073 size. The replacement chart covers 1960 through 1965 vehicle production years with corresponding bulb specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
Front Turn Signal
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 |
|---|---|---|---|
| 1964-1965 | 1156 | P21W | Check Price |
| 1963 | 1073 | 1073 | Check Price |
| 1961-1962 | 1156 | P21W | Check Price |
| 1960 | 1073 | 1073 | Check Price |
Rear Turn Signal
| Years | Bulb Type | Shop |
|---|---|---|
| 1965 | 1034 | Check Price |
| 1964 | 1073 | Check Price |
| 1963 | 1034 | Check Price |
| 1962 | 1073 | Check Price |
| 1961 | 1034 | Check Price |
| 1960 | 1073 | Check Price |
Bulb Specifications
| Description | Type | Shop |
|---|---|---|
| ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. 12V, 21W. | 1156 | Check Price |
| ECE standard (Europe & worldwide). Single-filament signalling bulb with BA15s bayonet base. 12V, 21W. | P21W | Check Price |
| ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. Lower wattage variant of 1156. 12V, 13W. | 1073 | Check Price |
| ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base. Variant of 1157. 12V, 21/5W. | 1034 | Check Price |