White/GMC WCM Side Marker Bulb Size

White/GMC WCM front side marker bulbs use 1157 size while rear side marker bulbs use 194 size. Replacement chart data covers 1988 to 1994 production years with bulb size specifications.

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

Front Side Marker

YearsUS TypeEU TypeShop
1988-19941157P21/5WCheck Price

Rear Side Marker

YearsUS TypeEU TypeShop
1988-1994194W5WCheck Price

Bulb Specifications

Description Type Shop
ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base. 12V, 21W/5W.1157Check Price
ECE standard (Europe & worldwide). Dual-filament signalling bulb with BAY15d bayonet base. 12V, 21W/5W.P21/5WCheck Price
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 3.78W.194Check Price
ECE standard (Europe & worldwide). Single-filament signalling bulb with W2.1x9.5d wedge base. 12V, 5W.W5WCheck Price

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