R8S Factory-verified

Cadillac · Regular Production Option

OnStar One Super Cruise extension to 8 years

Years 2026–27 Models 6 Factory citations 12

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Also described as OnStar One Super Cruise extension, to 8 years

Also documented for Buick Chevrolet GMC

Documented applications

CT5 — Alpha 2 (2020–2026)

2026 Factory-verified

only in: CT5 (Premium Luxury, Sport)

GM factory document — 2026 cadillac ct5 fleet order guide rpo codes, p.1.

Escalade IQ — Ultium BEV (2025–2027)

2026–2027 Factory-verified

2027 guide: all trims: O

GM factory document — 2026 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.
GM factory document — 2027 cadillac all electric escalade iql fleet order guide, p.14.

Escalade — T1XX, 5th gen (2021–2027)

2026–2027 Factory-verified

2027: O on all trims

GM factory document — 2026 cadillac escalade escalade v fleet order guide, p.15.
GM factory document — 2027 cadillac escalade escalade v fleet order guide, p.16.

Lyriq — BEV3 (2023–2027)

2026–2027 Factory-verified

GM factory document — 2026 cadillac all electric lyriq lyriq v fleet order guide rpo codes, p.1.
GM factory document — 2027 cadillac all electric lyriq lyriq v fleet order guide rpo codes, p.1.

Optiq — BEV3 (2025–2027)

2026–2027 Factory-verified

GM factory document — 2026 cadillac all electric optiq optiq v 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

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 R8S in the Cadillac reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.