GMC K2500 Turn Signal Bulb Size

GMC K2500 front and rear turn signal bulbs utilize 2357NA, 3057, 2057NA, 1157, and 2057 sizes depending on location and model variation. The replacement chart covers 1979 through 2000 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

YearsBulb Size
1993-20002357NA
19923057
1988-19912357NA
1983-19862057NA
19821034NA
19811157
1979-19801157NA

Rear Turn Signal

YearsBulb Size
1995-20003057
19941157
1990-19933057
1988-19892057
1983-19862057
1979-19821157

Bulb Specifications

Description Bulb Size
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 bulb with BAY15d bayonet base. Brighter variant of 1157. 12V, 26.9W/8W.2057

Other Locations