The Buick Enclave tail light requires a 7443 bulb size for the specific lighting component located at the rear of the vehicle. Data for the bulb specifications covers the range from 2017 to 2017.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Buick Enclave uses two distinct bulb types across its tail light assembly: the 194 for the inner tail light position and the 7443 for the outer tail light position.
Both bulb types are consistent across all model years from 2008-2018, meaning no fitment changes occurred within this generation of the Enclave's tail light configuration.
The 194 is a T10 miniature wedge bulb rated at 12V and 3.78W, placing it in the low-wattage category typically associated with marker, courtesy, and indicator lighting rather than primary stop or turn functions.
The 7443 is a T20 dual-filament wedge bulb rated at 12V with a 21W/5W output, where the higher wattage filament serves a brighter function such as braking or turn signaling, and the lower wattage filament serves a secondary function such as running light operation.
Both the 194 and 7443 are classified under ANSI standards applicable in the United States and Canada, indicating standardized electrical and physical specifications across compliant manufacturers.
The T10 and T20 designations refer to the tubular envelope sizing of each bulb, with T20 being physically larger than T10. These two types are not interchangeable with each other due to differences in size, wattage, and filament configuration.
The dual-filament design of the 7443 means the outer tail light on the Buick Enclave (2008-2018) serves more than one lighting function from a single bulb socket, a common arrangement in combined stop and tail light assemblies.
The single-filament 194 used in the inner tail light position operates at a notably lower wattage than the 7443, reflecting its role as a supplementary rather than primary light source within the tail light assembly.