Pontiac LeMans Headlight Bulb Size

Additional Notes

• All headlight bulb sizes specified for the Pontiac LeMans across 1963-1981 are sealed beam units, meaning the entire lens-reflector-filament assembly is replaced as one piece rather than replacing an internal bulb separately.
• Every sealed beam type listed for the LeMans operates at 12 volts and conforms to ANSI standards recognized in both the United States and Canada.
• The H6054 is a 5x7-inch rectangular sealed beam unit used on the LeMans for both high and low beam functions during 1978-1981, making it the only type in these specifications where a single part number serves both beam positions simultaneously.
• The 1976-1977 LeMans used separate part numbers for high and low beams despite sharing the same 4x6-inch rectangular sealed beam format: the H4651 handled high beam output while the H4652, a variant of that unit, handled low beam output.
• The H6024, a 7-inch round sealed beam unit, served both high and low beam positions on the 1973-1975 LeMans under a single shared part number, similar to the H6054 arrangement used in later years.
• The 1963-1972 LeMans used a split-type sealed beam system with two distinct round units: the H5001, a 4-inch square sealed beam, covered high beam duty, while the H5006, a 5.75-inch round sealed beam, handled low beam output.
• The H5001 and H5006 pairing represents the longest continuous fitment period in these specifications, spanning the 1963-1972 model years across both beam positions.
• Because each sealed beam type has a physically distinct size and shape, substitution between part numbers is not supported by these specifications, and fitment is specific to the beam position and model year combination listed.