Daytime running lamps, LED, separate cavity

Years 2016–19, 2025–27 Models 3 Factory citations 9

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Also described as Daytime running lamps

Also documented for Chevrolet GMC

Documented applications

Cascada — Delta II (2016–2019)

2016–2019 Factory-verified

all trims: S; the 2019 guide drops separate cavity

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 — Gamma II (2013–2022)

2018–2019 Factory-verified

all trims: S; the 2014 guide prints T3W

GM factory document — 2018 buick encore order guide copy gm authority, p.5, p.20.
GM factory document — 2019 buick encore order guide copy gm authority, p.4, p.18.

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.

This page aggregates every documented appearance of T3S in the Buick reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.