The International S2155 uses H6024 bulb size for both high beam and low beam headlight applications. The replacement chart covers vehicle production spanning 1984 to 1989.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The International S2155 uses the H6024 bulb size across both high beam and low beam headlight positions for the full 1984-1989 model range.
The H6024 is an ANSI-standardized sealed beam unit recognized in both the United States and Canada, operating at 12 volts.
A sealed beam unit integrates the filament, reflector, and lens into a single non-serviceable assembly, meaning the entire unit is replaced rather than an internal bulb.
The H6024 follows a 7-inch round form factor, a standardized size that was widely adopted across commercial and fleet vehicles of that era.
Because the H6024 is a sealed beam type, it is not compatible with retrofit housings designed for replaceable bulb formats without additional modification.
The identical H6024 fitment across both high and low beam positions indicates the S2155 uses a dual-function sealed beam configuration rather than separate dedicated housings for each beam mode.