The Buick Apollo high beam and low beam headlight assemblies both utilize the H6024 bulb size. The replacement chart covers vehicle production spanning 1973 to 1975.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The H6024 is the sole bulb type listed across all headlight positions for the Buick Apollo, appearing in both high beam and low beam applications for the 1973-1975 model years.
The H6024 is a 7-inch round sealed beam unit operating at 12 volts, conforming to ANSI standards recognized in both the United States and Canada.
As a sealed beam unit, the H6024 does not contain a separately replaceable filament or bulb element. When the unit fails, the entire assembly is replaced as a single component.
The shared H6024 fitment across both the high beam and low beam positions indicates that the Buick Apollo uses a four-headlight system, in which each sealed beam unit handles a dedicated beam function rather than a dual-filament design serving both functions from one housing.