Sunroof, power UltraView, double-sized glass roof that opens over the first row, tilt-sliding with express-open and power sunshade

Years 2009, 2014–19, 2023, 2025–27 Models 9 Factory citations 26

Also described as Sunroof, UltraViewSunroof, UltraView, power, independent front and rear shade controlSunroof, UltraView, powerRoof, sun, glass, sliding, electric, transparent glass fixedSunroof, power panoramicSunroof, power, dual panel glass, tilt and slidingSunroof, power, UltraViewSunroof, power UltraView

Also documented for Buick Chevrolet GMC Saturn

Documented applications

CT5 — Alpha 2 (2020–2026)

2023, 2025–2026 Factory-verified

Premium Luxury, Sport: 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.19.

CT6 — Omega (2016–2020)

2017 Factory-verified

base: O with UEU; Luxury: O with DRZ; Premium Luxury, Platinum: S

GM factory document — 2017 cadillac ct6 fleet order guide wayback, p.2.

CTS — Alpha (2014–2019)

2014–2015, 2018–2019 Factory-verified

Vsport: not available in 2014–2015, O in 2018; 2019 per GM's 2019 CTS Sedan order guide (V-Sport and V-Sport Premium Luxury columns agree)

GM factory document — 2014 cadillac cts sedan fleet order guide wayback, p.2.
GM factory document — 2015 cadillac cts sedan fleet order guide wayback, p.2.
GM factory document — 2018 cadillac cts sedan fleet order guide wayback, p.2.
GM factory document — 2019 cadillac cts order guide copy gm authority, p.13.

CTS — Sigma II (2008–2015)

2009, 2014 Factory-verified

The 2014 V Sedan guide calls it the UltraView double-size power sunroof; CTS-V Sedan: O

GM factory document — 2009 cadillac cts rpo code list, p.1.
GM factory document — 2014 cadillac cts v sedan fleet order guide wayback, p.2.

Escalade — T1XX, 5th gen (2021–2027)

2023, 2025–2027 Factory-verified

2027: S on all trims; 2027 order guides call it Power SkyGlass roof

GM factory document — 2023 cadillac 23 escalade escalade esv electrical body builder sm en us 2022oct25, p.10.
GM factory document — 2025 cadillac new escalade escalade v fleet order guide, p.10.
GM factory document — 2027 cadillac escalade escalade v fleet order guide, p.12.

SRX — Theta Premium / GMT166 (2010–2016)

2016 Confirmed

not offered on Standard; GM's 2016 SRX order guide (GM Authority's copy, published September 18, 2015)

XT4 — E2 (2019–2025)

2025 Factory-verified

Premium Luxury, Sport: O

GM factory document — 2025 cadillac xt4 fleet order guide, p.9.
GM factory document — 2025 cadillac xt4 fleet order guide rpo codes, p.1.

XT5 — C1XX (2017–2026)

2025–2026 Factory-verified

Premium Luxury, Sport: S; Luxury: not available

GM factory document — 2025 cadillac xt5 fleet order guide rpo codes, p.1.
GM factory document — 2026 cadillac xt5 fleet order guide rpo codes, p.1.
GM factory document — 2025 cadillac xt5 fleet order guide, p.5.
GM factory document — 2025 cadillac xt5 fleet order guide, p.26.
GM factory document — 2026 cadillac xt5 fleet order guide, p.6.
GM factory document — 2026 cadillac xt5 fleet order guide, p.27.

XT6 — C1XX (2020–2025)

2025 Factory-verified

All trims: S

GM factory document — 2025 cadillac xt6 fleet order guide, p.5.
GM factory document — 2025 cadillac xt6 fleet order guide, p.62.

This page aggregates every documented appearance of C3U in the Cadillac reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.