Buick Envision Parking Light Bulb Size

The Buick Envision parking light requires 7444NA or 7443NA bulb sizes depending on the specific configuration of the lighting assembly. Data for the lighting components covers the period from 2016 through 2020.

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

Bulb Size by Year Range

Years	US Type	EU Type	Shop
2020	7444NA	WY21/5W	Check Price
2019	7443NA	WY21/5W	Check Price
2018	7444NA	WY21/5W	Check Price
2016-2017	7443NA	WY21/5W	Check Price

Bulb Specifications

Description	Type	Shop
ANSI standard (US & Canada). Dual-filament wedge bulb (T20), natural amber glass. 12V, 21W/5W.	7444NA	Check Price
ANSI standard (US & Canada). Dual-filament wedge bulb (T20), natural amber glass. 12V, 21W/5W.	7443NA	Check Price

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Additional Notes

The 7444NA and 7443NA are both dual-filament wedge bulbs built to the T20 form factor, operating at 12 volts with a wattage rating of 21W on the high filament and 5W on the low filament.
Both bulb types carry ANSI standardization recognized in the United States and Canada, and both feature natural amber glass rather than a clear envelope with a colored coating.
The natural amber glass construction produces amber light directly through the glass material itself, which is a distinct characteristic from bulbs that rely on an amber-tinted housing or lens to achieve the same color output.
The Buick Envision uses the 7443NA for the 2016-2017 and 2019 model years, while the 7444NA is specified for the 2018 and 2020 model years, meaning the two bulb types alternate across the production run rather than following a single consistent fitment.
Although the 7443NA and 7444NA share the same T20 wedge base, voltage rating, wattage configuration, and natural amber glass, they carry distinct ANSI part numbers, which indicates a difference in their electrical or physical specifications that affects direct interchangeability.