Chevrolet Truck Headlight Bulb Size

Chevrolet Truck headlight bulb sizes include H6024, H5001, and H6006 for high beam applications, along with H6024, H5006, and H6006 for low beam configurations, with each bulb size representing distinct specifications for front lighting assemblies. The replacement chart covers vehicle production years spanning 1950 to 1960, documenting headlight bulb specifications across that decade.

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
1960	H6024 (With 2 Headlamps)
1960	H5001 (With 4 Headlamps)
1958-1959	H5001
1956-1957	H6024
1950-1955	H6006

Low Beam Headlight

Years	Bulb Size
1960	H6024 (With 2 Headlamps)
1960	H5006 (With 4 Headlamps)
1958-1959	H5006
1956-1957	H6024
1950-1955	H6006

Bulb Specifications

Description	Bulb Size
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). 4-inch square sealed beam unit. Not a replaceable bulb — the entire unit is replaced. 12V.	H5001
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 H6006 is the most frequently specified bulb across these specifications, appearing in both high beam and low beam positions for the Chevrolet Truck from 1950-1955. It is a 5x7-inch rectangular sealed beam unit rated at 12V and built to ANSI standards for the US and Canadian markets.
All four bulb types listed, H6024, H5001, H6006, and H5006, are sealed beam units, meaning the lens, reflector, and filament are fused into a single assembly. When a filament fails, the entire unit requires replacement rather than an internal bulb swap.
The H6024 is a 7-inch round sealed beam unit rated at 12V. It serves as both the high beam and low beam source in two-headlamp configurations on the 1956-1957 Chevrolet Truck, functioning as a dual-filament unit that handles both lighting modes within one assembly.
The 1960 Chevrolet Truck introduced a headlamp system variation that directly affects bulb fitment. Two-headlamp configurations use the H6024 for both beams, while four-headlamp configurations split the functions, assigning the H5001 to high beam duty and the H5006 to low beam duty.
The H5001 is a 4-inch square sealed beam unit rated at 12V. Its square form factor distinguishes it physically from the round and rectangular units in these specifications, and it is exclusive to the high beam position in four-headlamp 1960 configurations.
The H5006 is a 5.75-inch round sealed beam unit rated at 12V. It appears only in the low beam position for 1958-1960 four-headlamp configurations, making it non-interchangeable with the H6024 despite both being round sealed beam units of different sizes.
The transition from H6006 to H6024 between 1955 and 1956 represents a change in both form factor and function. The H6006 is a rectangular unit used in separate high and low beam roles, while the H6024 is a round dual-filament unit consolidating both functions into a single assembly.
All bulb types in these specifications conform to ANSI standards applicable in both the United States and Canada, indicating standardized sizing and electrical ratings that allow cross-brand compatibility within those regional markets.