GMC C2500 Suburban Turn Signal Bulb Size

The GMC C2500 Suburban front turn signal requires bulb sizes 2357NA, 3057, or 2057NA, while the rear turn signal uses 3057, 2057, or 1157 bulb sizes. The replacement chart covers vehicle production years spanning 1979 to 1999 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
1993-19992357NA
19923057
1983-19862057NA
1979-19821157NA

Rear Turn Signal

YearsBulb Size
1992-19993057
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. 12V, 21W/5W.1157NA
ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base. Brighter variant of 1157. 12V, 26.9W/8W.2057
ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base. 12V, 21W/5W.1157

Other Locations