Chevrolet K-Series Pickup Headlight Bulb Size

Additional Notes

• The H6054 is a 5x7-inch rectangular sealed beam unit rated at 12V. It serves as both the high beam and low beam source in two-lamp configurations, as the entire unit handles both functions and is replaced as a whole rather than by an internal bulb.
• The 9005 and 9006 are single-filament halogen capsule bulbs used in the Chevrolet K-Series Pickup from 1992-2000 when equipped with halogen capsule headlamps. The 9005 handles the high beam at 65W with a P20d base, while the 9006 handles the low beam at 55W with a P22d base. These two types are not interchangeable despite their similar appearance, as their bases differ.
• The H6024 is a 7-inch round sealed beam unit rated at 12V. Like all sealed beam types in these specifications, the entire unit is replaced rather than an internal component. It was the sole headlamp type listed for the K-Series Pickup in 1975-1978, and it continued as an option alongside rectangular configurations in 1979-1980.
• Four-lamp configurations across the model's history used smaller sealed beam units rather than the H6054. The specific types varied by year: H4651 and H4652 or H4656 appeared in 1981-1986, while H4701 and H4703 were used in 1988-1991. These units are not interchangeable with the H6054 used in two-lamp setups.
• In four-lamp setups, the high beam and low beam functions are split between separate sealed beam units. For example, in 1990-1991, the H4701 handled the high beam while the H4703 handled the low beam. Substituting one for the other would result in incorrect beam output.
• All sealed beam units listed in these specifications, including the H6054, H6024, H4701, H4703, H4651, H4652, and H4656, conform to ANSI standards applicable in both the United States and Canada. None of them contain a replaceable internal bulb.
• The 1979-1980 model years are the only ones in these specifications where both round and rectangular sealed beam configurations are listed simultaneously, with the H6024 covering round headlamp setups and the H6054 covering rectangular ones.
• The low beam sealed beam units used in four-lamp configurations show variation across years. The H4652 appeared in 1982-1983 and 1986, the H4656 in 1981, 1984-1985, and the H4703 in 1988-1991. These are distinct part numbers and are not listed as interchangeable with one another.