Buick Lucerne Headlight Bulb Size

Buick Lucerne high beam headlight bulbs use 9005 size while low beam headlight bulbs use 9006 size. The replacement chart covers vehicle production spanning 2006 to 2011 with corresponding bulb size specifications.

The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.

High Beam Headlight

Years	US Type	EU Type	Shop
2006-2011	9005	HB3	Check Price

Low Beam Headlight

Years	US Type	EU Type	Shop
2006-2011	9006	HB4	Check Price

Bulb Specifications

Description	Type	Shop
ANSI standard (US & Canada). Single-filament halogen bulb with P20d base. 12V, 65W.	9005	Check Price
ANSI standard (US & Canada). Single-filament halogen bulb with P22d base. 12V, 55W.	9006	Check Price

Other Locations

Additional Notes

The Buick Lucerne uses the 9005 bulb for high beam headlights and the 9006 bulb for low beam headlights across all model years from 2006-2011.
Both the 9005 and 9006 are ANSI-standardized halogen bulb types recognized in the United States and Canada, meaning they conform to a defined set of electrical and physical specifications.
The 9005 is a single-filament halogen bulb rated at 12V and 65W, fitted with a P20d base, and is designated for high beam use in the Lucerne.
The 9006 is a single-filament halogen bulb rated at 12V and 55W, fitted with a P22d base, and handles low beam output. Its lower wattage reflects the reduced light intensity typical of low beam applications.
Although the 9005 and 9006 share the same voltage rating and a visually similar form, their bases differ: the P20d base of the 9005 and the P22d base of the 9006 are not interchangeable, as the base designations indicate different pin configurations and locking tab positions.
The 10-watt difference between the 9005 and 9006 means the high beam draws more power from the vehicle's electrical system, which is consistent with the greater luminous output required for high beam operation.