GMC K1500 Turn Signal Bulb Size

The GMC K1500 front and rear turn signal bulbs utilize sizes 3157NA, 2357NA, 3057, and 1157, with front applications requiring 3157NA, 2357NA, or 3057 bulbs and rear applications requiring 3157, 3057, or 1157 bulbs. The replacement chart covers 1979 through 1999 production years with corresponding bulb size specifications.

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
19821034NA
19811157
1979-19801157NA

Rear Turn Signal

YearsBulb Size
19993157
19983057
1995-19971157
1990-19943057
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. Variant of 1157. 12V, 21/5W.1034NA
ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base. 12V, 21W/5W.1157
ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base, natural amber glass. 12V, 21W/5W.1157NA
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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