T83 Factory-verified

Buick · Regular Production Option

Headlamp control, automatic on and off

Years 2015–19, 2025–27 Models 9 Factory citations 24

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Also documented for Chevrolet GMC

Documented applications

Cascada — Delta II (2016–2019)

2016–2019 Factory-verified

1SV: S; 1SP, 1SH: not available

GM factory document — 2016 buick cascada order guide copy gm authority, p.3, p.8.
GM factory document — 2017 buick cascada order guide copy gm authority, p.3, p.13.
GM factory document — 2018 buick cascada order guide copy gm authority, p.3, p.13.
GM factory document — 2019 buick cascada order guide copy gm authority, p.3, p.13.

Encore GX — VSS-F (2020–2027)

2025–2027 Factory-verified

Preferred, Sport Touring, Avenir: S

GM factory document — 2025 buick encore gx fleet order guide, p.6.
GM factory document — 2026 buick encore gx fleet order guide, p.6.
GM factory document — 2027 buick encore gx fleet order guide, p.6.

Envision — D2XX, imported from China (2016–2020)

2016–2019 Factory-verified

all trims: S

GM factory document — 2016 buick envision order guide copy gm authority, p.4, p.14.
GM factory document — 2017 buick envision order guide copy gm authority, p.5, p.18.
GM factory document — 2018 buick envision order guide copy gm authority, p.4, p.17.
GM factory document — 2019 buick envision order guide copy gm authority, p.5, p.20.

Envision — E2XX (2021–2027)

2025–2027 Factory-verified

2027: all trims: S

GM factory document — 2025 buick envision fleet order guide rpo codes, p.1.
GM factory document — 2027 buick envision fleet order guide rpo codes, p.1.
GM factory document — 2027 buick envision fleet order guide, p.5.

Envista — VSS-F (2024–2027)

2025–2026 Factory-verified

all trims: S

GM factory document — 2025 buick envista fleet order guide rpo codes, p.1.
GM factory document — 2025 buick envista fleet order guide, p.5.
GM factory document — 2026 buick envista fleet order guide rpo codes, p.1.
GM factory document — 2026 buick envista fleet order guide, p.5.

LaCrosse — Epsilon II, 2nd gen (2010–2016)

2015 Factory-verified

2015: all groups: S

GM factory document — 2015 buick lacrosse fleet order guide wayback, p.3.

Regal — E2XX (2018–2020)

2018–2019 Factory-verified

2019: all trims: S (2019 Sportback order guide)

GM factory document — 2018 buick regal sportback fleet order guide wayback, p.1.
GM factory document — 2018 buick regal tourx fleet order guide wayback, p.1.
GM factory document — 2019 buick regal sportback order guide copy gm authority, p.5.

Regal — Epsilon II, 5th gen (2011–2017)

2016 Factory-verified

2016: all groups: S

GM factory document — 2016 buick regal order guide copy gm authority, p.5, p.20.

Verano — Delta II (2012–2017)

2016 Factory-verified

2016: all trims: S

GM factory document — 2016 buick verano fleet order guide wayback, p.3.

This page aggregates every documented appearance of T83 in the Buick reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.