Chevrolet Suburban Headlight Bulb Size

Additional Notes

• The 9005 is the most widely specified high beam bulb across the Chevrolet Suburban range, covering model years 2000-2021 without variation. It is a single-filament halogen bulb rated at 12V and 65W, fitted with a P20d base, and produced to the ANSI standard used in the United States and Canada.
• The H11 is the most widely specified low beam bulb in the Suburban's halogen headlamp configurations, appearing across model years 2007-2021 in that role. It is a single-filament halogen bulb rated at 12V and 55W, using a PGJ19-2 base, and is produced to the ECE standard, though it also carries US approval.
• For model years 2015-2020, the Chevrolet Suburban with HID headlamps takes a D3S low beam bulb rather than the H11 used in the halogen configuration. The D3S is a mercury-free xenon discharge bulb rated at 42V and 35W, with a PK32d-5 base and an integral ignitor, and it is designed specifically for projector-type housings. The high voltage and discharge technology of the D3S make it incompatible with standard halogen sockets.
• From 1992-1999, the Suburban was offered with either sealed beam or halogen capsule headlamps, and the bulb requirement differs between the two configurations. Sealed beam units use the H6054, a 5x7-inch rectangular unit in which the entire assembly is replaced rather than an individual bulb. Halogen capsule configurations use the 9005 for high beam and the 9006 for low beam, both of which are individually replaceable bulbs.
• The 9006 low beam bulb, rated at 12V and 55W with a P22d base, shares the same wattage as the H11 but uses a different base type. The two bulbs are not interchangeable despite their similar electrical ratings, as the P22d and PGJ19-2 bases are physically distinct.
• Several sealed beam types appear across the Suburban's earlier model years, and each is specific to a particular headlamp count or shape. The H6024 is a 7-inch round unit, the H6054 and H6006 are both 5x7-inch rectangular units, the H4651, H4652, and H4656 are 4x6-inch rectangular units, and the H5001 and H5006 are smaller units at 4-inch square and 5.75-inch round respectively. None of these accept a replacement bulb; the entire sealed beam unit is the serviceable component.
• In 1991, the four-headlamp configuration of the Suburban used the H4701 for high beam and the H4703 for low beam, both being 7-inch round sealed beam units. In 1988-1990, the four-headlamp setup shifted to 4x6-inch rectangular sealed beam units, with the H4651 serving the high beam position and the H4652 the low beam position, the latter being a variant of the former.
• The H6006 sealed beam, used on the Suburban from 1950-1955, is a 5x7-inch rectangular unit, the same physical format as the H6054 used in later years. Despite sharing that format, the two types are distinct ANSI designations and are not confirmed as interchangeable by the specifications.