T8Z Factory-verified

Cadillac · Regular Production Option

Buckle to Drive

Years 2023, 2025–27 Models 7 Factory citations 25

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Also documented for Buick Chevrolet GMC

Documented applications

CT4 — Alpha 2 (2020–2026)

2025–2026 Factory-verified

Luxury, Premium Luxury, Sport, V-Series: S; V-Series Blackwing: O

GM factory document — 2025 cadillac ct4 fleet order guide, p.2.
GM factory document — 2025 cadillac ct4 v ct4 v blackwing fleet order guide, p.2.
GM factory document — 2026 cadillac ct4 fleet order guide, p.2.
GM factory document — 2026 cadillac ct4 v ct4 v blackwing fleet order guide, p.2.

CT5 — Alpha 2 (2020–2026)

2023, 2025–2026 Factory-verified

Premium Luxury, Sport: S; V-Series: S; V-Series Blackwing: O

GM factory document — 2023 cadillac ct5 v ct5 v blackwing fleet order guide wayback, p.1.
GM factory document — 2025 cadillac ct5 fleet order guide rpo codes, p.1.
GM factory document — 2025 cadillac ct5 v ct5 v blackwing fleet order guide rpo codes, p.1.
GM factory document — 2026 cadillac ct5 fleet order guide rpo codes, p.1.
GM factory document — 2026 cadillac ct5 v ct5 v blackwing fleet order guide rpo codes, p.1.
GM factory document — 2025 cadillac ct5 fleet order guide, p.2.
GM factory document — 2026 cadillac ct5 fleet order guide, p.2.
GM factory document — 2025 cadillac ct5 v ct5 v blackwing fleet order guide, p.2.
GM factory document — 2026 cadillac ct5 v ct5 v blackwing fleet order guide, p.2.

Escalade IQ — Ultium BEV (2025–2027)

2025–2026 Factory-verified

GM factory document — 2025 cadillac all electric escalade iq fleet order guide rpo codes, p.1.
GM factory document — 2026 cadillac all electric escalade iql fleet order guide rpo codes, p.1.

Escalade — T1XX, 5th gen (2021–2027)

2023, 2025–2027 Factory-verified

2027: S on all trims

GM factory document — 2023 cadillac 23 escalade escalade esv electrical body builder sm en us 2022oct25, p.12.
GM factory document — 2025 cadillac new escalade escalade v fleet order guide, p.2.
GM factory document — 2027 cadillac escalade escalade v fleet order guide, p.3.

Lyriq — BEV3 (2023–2027)

2023, 2025–2027 Factory-verified

keeps the vehicle in Park until the driver belt is fastened (guides); all trims: S; Professional Vehicle (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

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.

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 T8Z in the Cadillac reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.