GMC C1500 Turn Signal Bulb Size

The GMC C1500 front turn signal bulb size includes 3157NA, 2357NA, and 3057 options, while rear turn signal bulb size encompasses 3157, 3057, and 1157 specifications. The replacement chart covers 1979 through 1999 production years 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.

Front Turn Signal

YearsBulb Size
19993157NA
1993-19982357NA
19923057
1988-19912357NA
1983-19862057NA
19821157NA
19811157
1979-19801157NA

Rear Turn Signal

YearsBulb Size
19993157
1997-19983057
19961157
1994-19953057
19931157
1990-19923057
1988-19892057
1983-19862057
1979-19821157

Bulb Specifications

Description Bulb Size
ANSI standard (US & Canada). Dual-filament wedge bulb (T25), natural amber glass. 12V, 27W/7W.3157NA
ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base, natural amber glass. 12V, 26.9W/8W.2357NA
ANSI standard (US & Canada). Dual-filament wedge bulb (T25). 12V, 27W/7W.3057
ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base, natural amber glass. Brighter variant of 1157. 12V, 26.9W/8W.2057NA
ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base, natural amber glass. 12V, 21W/5W.1157NA
ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base. 12V, 21W/5W.1157
ANSI standard (US & Canada). Dual-filament wedge bulb (T25). 12V, 27W/7W.3157
ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base. Brighter variant of 1157. 12V, 26.9W/8W.2057

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