GMC R2500 Side Marker Bulb Size

The GMC R2500 front side marker bulb uses a 194 or 168 size bulb for this model. The replacement chart covers 1987 to 1989 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 Side Marker

YearsBulb Size
1988-1989194
1987168

Bulb Specifications

Description Bulb Size
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 3.78W.194
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 4.9W.168

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