GMC Jimmy front and rear side marker bulbs utilize 194NA, 194, 168, and 3057 bulb sizes depending on location and model variation. The replacement chart covers 1973 through 2001 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.
The front side marker position on the GMC Jimmy uses three distinct bulb sizes across its model years: 194NA, 194, and 168.
The 194 and 194NA are both T10 miniature wedge bulbs rated at 12V and 3.78W, while the 168 is also a T10 miniature wedge bulb but draws more power at 4.9W.
The 194NA differs from the standard 194 in that it features natural amber glass, which produces an amber color output without relying on a tinted lens or housing.
The GMC Jimmy front side marker used the 168 bulb from 1974-1991, with the exception of 1973, which used the 194.
Front side marker fitment shifted to the 194 for 1992-1997, then to the 194NA for the 2001 model year.
Although the 194 and 168 share the same T10 wedge base and are physically interchangeable in many sockets, their wattage ratings differ, and substituting one for the other may not meet original equipment specifications.
The rear side marker on the GMC Jimmy (GMC Jimmy) uses either the 194 or the 3057, and these two bulbs are not interchangeable due to fundamentally different constructions and wattage ratings.
The 3057 is a dual-filament T25 wedge bulb rated at 12V with a 27W high filament and a 7W low filament, making it a significantly larger and more complex component than the single-filament T10 bulbs used elsewhere in the marker circuit.
The 2001 model year rear side marker specifies the 3057 specifically for vehicles equipped with an end gate configuration.
Rear side marker fitment for 1995-1997 also uses the 3057, while 1979 and 1985-1991 use the 194.