Tail lamps, LED, choreography capable

Years 2023, 2025–27 Models 5 Factory citations 13

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Also described as Rear combination lamps, uplevelTail lamps

Also documented for Buick Chevrolet GMC

Documented applications

Escalade IQ — Ultium BEV (2025–2027)

2025–2027 Factory-verified

GM factory document — 2025 cadillac all electric escalade iq fleet order guide rpo codes, p.1.
GM factory document — 2027 cadillac all electric escalade iql fleet order guide rpo codes, p.1.

Escalade — T1XX, 5th gen (2021–2027)

2026 Factory-verified

GM factory document — 2026 cadillac escalade escalade esv electrical body builder manual service manual 2026 en us, p.8.

Lyriq — BEV3 (2023–2027)

2023, 2025–2027 Factory-verified

the 2023 list reads LED with advanced choreography; 2025, 2027: all trims: S; Professional Vehicle (S); 2026: only in: Luxury trims, Sport trims (S)

GM factory document — 2023 cadillac all new electric lyriq fleet order guide wayback, p.3.
GM factory document — 2025 cadillac all electric lyriq fleet order guide rpo codes, p.1.
GM factory document — 2027 cadillac all electric lyriq professional vehicle fleet order guide rpo codes, p.1.

Optiq — BEV3 (2025–2027)

2025–2027 Factory-verified

2025: Luxury 1SE, Sport 1SH: S; Luxury 1SC, Sport 1SF: not available; 2026–2027: Premium Luxury, Premium Sport, V-Series: S; Luxury, Sport: not available

GM factory document — 2025 cadillac all electric optiq fleet order guide rpo codes, p.1.
GM factory document — 2027 cadillac all electric optiq optiq v fleet order guide rpo codes, p.1.
GM factory document — 2025 cadillac all electric optiq fleet order guide, p.7.
GM factory document — 2026 cadillac all electric optiq optiq v fleet order guide, p.7.
GM factory document — 2027 cadillac all electric optiq optiq v fleet order guide, p.8.

Vistiq — BEV3 (2026–2027)

2026–2027 Factory-verified

all trims: S

GM factory document — 2026 cadillac all electric vistiq fleet order guide, p.56.
GM factory document — 2027 cadillac all electric vistiq fleet order guide, p.56.

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