Chevrolet Malibu Headlight Bulb Size

Additional Notes

• The 9005 bulb is the most frequently specified high beam type across the Chevrolet Malibu's headlight history, appearing in model years 1997-2003, 2016-2021, 2023, and 2024. It is an ANSI-standard single-filament halogen bulb rated at 12V and 65W, fitted with a P20d base.
• The H11 bulb holds the same dominant position for low beam applications, covering model years 2004-2007, 2019-2021, 2023, and 2024. It operates under the ECE standard with a PGJ19-2 base, rated at 12V and 55W, though it carries US approval as well.
• The 2016-2018 Malibu presents a notable fitment detail: the low beam position uses a 9005 bulb, the same type specified for the high beam. Although the 9005 and H11 share a similar wattage class, their bases are physically different, making them non-interchangeable despite both being single-filament halogen types.
• For model years 2019 and 2020, the 9005 high beam and H11 low beam specifications carry a "With Halogen Capsule Headlamps" qualifier, indicating those bulb sizes apply specifically to that headlamp configuration rather than to all variants of those model years.
• The H9 bulb, specified for the high beam position in the 2004-2007 Malibu, shares the same 12V, 65W rating as the 9005 but uses a PGJ19-5 base. The two bulbs are not physically interchangeable despite their identical power ratings.
• Sealed beam units, including the H6024, H6054, H4651, H4652, H4656, H5001, and H5006 types, were specified across model years 1964-1983. These are complete lens-and-filament assemblies governed by ANSI standards, meaning the entire unit is replaced rather than an internal bulb.
• The 1978-1981 Malibu used the H6054 sealed beam for both high and low beam positions, a 5x7-inch rectangular unit. In contrast, the 1973-1975 models used the H6024, a 7-inch round sealed beam, for both positions, reflecting a different headlamp housing format entirely.
• The 1982 and 1983 model years show a split between high and low beam sealed beam types: the 1983 Malibu used the H4651 for high beam and the H4652 for low beam, while the 1982 model paired the H4651 high beam with the H4656 low beam. All three are 4x6-inch rectangular units but are distinct part numbers and are not interchangeable across positions.