GMC M300 Turn Signal Bulb Size

The GMC M300 front and rear turn signal bulb sizes include 1073, 1034, and 1129 specifications. The replacement chart covers vehicle production years spanning 1954 to 1957.

The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.

Front Turn Signal

YearsBulb TypeShop
19571073Check Price
19561034Check Price
1954-19551129Check Price

Rear Turn Signal

YearsBulb TypeShop
19571034Check Price
19561073Check Price
1954-19551129Check Price

Bulb Specifications

Description Type Shop
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. Lower wattage variant of 1156. 12V, 13W.1073Check Price
ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base. Variant of 1157. 12V, 21/5W.1034Check Price
ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base. Variant of 1157. 12V, 21/5W.1129Check Price

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