The Buick Sportwagon high beam headlight uses an H5001 bulb size while the low beam headlight requires an H5006 bulb size. The replacement chart covers vehicle production years spanning 1964 to 1972 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 Buick Sportwagon uses the H5001 bulb size for high beam headlights across all 1964-1972 model years covered in these specifications.
The H5001 is a 4-inch square sealed beam unit operating at 12V. It conforms to ANSI standards recognized in both the United States and Canada. Because it is a sealed beam design, the entire unit is replaced rather than an internal filament or capsule.
The H5006 bulb size is specified for low beam headlights across all 1964-1972 model years of the Buick Sportwagon.
The H5006 is a 5.75-inch round sealed beam unit, also rated at 12V and conforming to the same ANSI standards as the H5001. Like the H5001, the H5006 is a sealed beam unit requiring full unit replacement.
The H5001 and H5006 are physically distinct units. The H5001 is square while the H5006 is round, and the two differ in size. These physical differences make the two types non-interchangeable between high and low beam positions.
Both sealed beam types share the same 12V operating voltage, which reflects the standardized 12-volt electrical systems common to passenger vehicles of this era.
The sealed beam construction of both the H5001 and H5006 means the lens, reflector, and filament are fused into a single glass unit. Damage to any one of those elements requires replacement of the whole assembly.