Pontiac Star Chief Headlight Bulb Size

Pontiac Star Chief headlight bulb sizes include H5001, H6024, and H6006 for high beam applications, with H5006, H6024, and H6006 options available for low beam configurations, each bulb representing a distinct size specification. The replacement chart covers vehicle production years spanning 1954 through 1966, documenting headlight bulb size requirements across this model generation.

The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.

High Beam Headlight

Years	Bulb Size
1958-1966	H5001
1955-1957	H6024
1954	H6006

Low Beam Headlight

Years	Bulb Size
1958-1966	H5006
1955-1957	H6024
1954	H6006

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). 4-inch square sealed beam unit. Not a replaceable bulb — the entire unit is replaced. 12V.	H5001
ANSI standard (US & Canada). 7-inch round sealed beam unit. Not a replaceable bulb — the entire unit is replaced. 12V.	H6024
ANSI standard (US & Canada). 5x7-inch rectangular sealed beam unit. Not a replaceable bulb — the entire unit is replaced. 12V.	H6006
ANSI standard (US & Canada). 5.75-inch round sealed beam unit. Not a replaceable bulb — the entire unit is replaced. 12V.	H5006

Other Locations

Additional Notes

The H5001 and H5006 sealed beam units are the most frequently specified bulbs across the Pontiac Star Chief's headlight fitment data, covering both high beam and low beam positions for the 1958-1966 model years respectively.
The H5001 is a 4-inch square sealed beam unit operating at 12V and conforming to ANSI standards applicable in both the United States and Canada. As a sealed beam design, the entire unit is replaced rather than an internal filament or capsule.
The H5006 is a 5.75-inch round sealed beam unit, also rated at 12V and built to the same ANSI standard. It serves exclusively as the low beam unit in the 1958-1966 Star Chief, while the H5001 handles the high beam function for those same years.
The 1957 Star Chief uses the H6024 for both high beam and low beam positions. The H6024 is a 7-inch round sealed beam unit rated at 12V, meaning a single bulb type covers both lighting functions in that model year, unlike the split H5001/H5006 arrangement used in later years.
The 1954 Star Chief specifies the H6006 for both high beam and low beam positions. The H6006 is a 5x7-inch rectangular sealed beam unit rated at 12V and conforming to ANSI standards for the US and Canada.
All four bulb types listed across the Star Chief specifications are sealed beam units, meaning the lens, reflector, and filament are fused into a single assembly. Replacement requires swapping the entire unit rather than an individual component.
The 1955-1956 Star Chief shares the H6024 specification with the 1957 model year, making the H6024 the designated fitment across three consecutive years before the transition to the split high/low beam arrangement beginning in 1958.
Because the H5001 and H5006 are physically distinct units serving separate beam functions in the 1958-1966 Star Chief, the two types are not interchangeable with each other despite both being 4-inch square and 5.75-inch round sealed beams respectively within the same ANSI framework.