The GMC Safari front side marker bulb uses a 194 or 194NA size, while the rear side marker bulb requires a 194 size. The replacement chart covers vehicle production spanning 1985 to 2005 with corresponding bulb specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The 194 bulb is the dominant fitment across the GMC Safari side marker specifications, serving both front and rear positions across the full model range covered in the data.
The 194 is an ANSI-standard miniature wedge bulb in the T10 form factor, rated at 12V and 3.78W, recognized in both the United States and Canada.
The 194NA shares the same T10 wedge form factor, voltage, and wattage as the 194, but is distinguished by its natural amber-tinted glass envelope rather than clear glass.
For the GMC Safari front side marker, the 2002-2005 model years carry a headlamp-dependent split fitment, where halogen capsule headlamp-equipped vehicles use the 194 and sealed beam headlamp-equipped vehicles use the 194NA.
The amber tint of the 194NA is built into the glass itself, meaning the bulb produces colored light without relying on a colored lens housing to achieve the amber output required in sealed beam headlamp configurations.
Because the 194 and 194NA share identical physical and electrical specifications, the two bulbs are mechanically interchangeable, though substituting one for the other affects the color output at the lamp.
Front side marker fitment on the Safari from 1985-2001 is uniformly the 194 across all listed years, with no headlamp-type condition applied during that period.
The rear side marker position on the Safari uses the 194 exclusively across all years listed, with no variant fitment based on trim or equipment level.
Rear side marker coverage in the specifications begins at 1995, while front side marker coverage extends back to 1985, reflecting a difference in the year range documented for each position.
The T10 wedge base design of both the 194 and 194NA requires no separate bulb holder or locking mechanism beyond the friction fit of the wedge base into its socket.