Trim group, Luxury

Years 2006–09, 2014–15, 2017–19, 2023, 2025–27 Models 12 Factory citations 27

Also described as Equipment group, StandardEquipment group, Luxury, 2.0L turbo, rear-wheel driveOption package 03Equipment group, Premium trim (later Premium Luxury)Equipment group 1SC, SportPackage, option 03Equipment group, LuxuryEquipment group, Premium Luxury, front-wheel driveEquipment group, Premium Luxury, FWD

Also documented for Buick Chevrolet GMC Pontiac Saturn

Documented applications

ATS — Alpha (2013–2019)

2014–2015, 2018–2019 Factory-verified

2014 and 2015: Standard, 2.0L turbo, rear-wheel drive (6AB69 sedan, 6AB47 coupe); 2018: the base ATS trim level of the coupe and sedan guides; 2019 from GM Authority's 2019 ATS interior colors page

GM factory document — 2014 cadillac ats fleet order guide wayback, p.4.
GM factory document — 2015 cadillac ats coupe fleet order guide wayback, p.2.
GM factory document — 2018 cadillac ats coupe fleet order guide wayback, p.2.
GM factory document — 2018 cadillac ats sedan fleet order guide wayback, p.2.

CT6 — Omega (2016–2020)

2017 Factory-verified

column heading of the guide's equipment pages (model 6KJ69)

GM factory document — 2017 cadillac ct6 fleet order guide wayback, p.2.
GM factory document — 2017 cadillac ct6 fleet order guide wayback, p.4.

CTS — Sigma / GMX320 (2003–2007)

2007 Factory-verified

GM factory document — 2007 cadillac cts rpo code list, p.1.

Escalade IQ — Ultium BEV (2025–2027)

2025–2027 Factory-verified

the 2025 guide names this group Luxury 1

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

Escalade — K2XX (2015–2020)

2015, 2017, 2019 Factory-verified

the 2015 guide's Premium column; NICB lists Premium Collection for 2015–2016 and Premium Luxury from 2017; GM Authority for 2017 (renamed) and 2019

GM factory document — 2015 cadillac escalade fleet order guide wayback, p.2.

Escalade — T1XX, 5th gen (2021–2027)

2023, 2025–2027 Factory-verified

GM factory document — 2023 cadillac 23 escalade escalade esv electrical body builder sm en us 2022oct25, p.9.
GM factory document — 2025 cadillac new escalade escalade v fleet order guide, p.1.
GM factory document — 2027 cadillac escalade escalade v fleet order guide, p.1.

Lyriq — BEV3 (2023–2027)

2025–2027 Factory-verified

model 6MB26 RWD/AWD; also the only trim column of the 2027 Professional Vehicle guide

GM factory document — 2025 cadillac all electric lyriq fleet order guide, p.1.
GM factory document — 2026 cadillac all electric lyriq lyriq v fleet order guide, p.1.
GM factory document — 2027 cadillac all electric lyriq lyriq v fleet order guide, p.1.
GM factory document — 2027 cadillac all electric lyriq professional vehicle fleet order guide, p.1.

Optiq — BEV3 (2025–2027)

2025–2027 Factory-verified

2025 guide: Luxury 1SC (AWD); 2026–2027: RWD/AWD

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

SRX — Sigma / GMT265 (2004–2009)

2006–2009 Factory-verified

GM factory document — 2006 cadillac srx rpo code list, p.1.
GM factory document — 2009 cadillac srx rpo code list, p.1.

Vistiq — BEV3 (2026–2027)

2026–2027 Factory-verified

model 6MB56 AWD; NICB VIN series 3K (2026)

GM factory document — 2026 cadillac all electric vistiq fleet order guide, p.1.
GM factory document — 2027 cadillac all electric vistiq fleet order guide, p.1.

XT5 — C1XX (2017–2026)

2025–2026 Factory-verified

Premium Luxury trim with the FWD code standard; model number printed 6NH26

GM factory document — 2025 cadillac xt5 fleet order guide, p.1.
GM factory document — 2026 cadillac xt5 fleet order guide, p.1.

XT6 — C1XX (2020–2025)

2025 Factory-verified

FWD column of the Premium Luxury model 6NW26; FWD is standard in 1SA and 1SC and F48 in 1SB, 1SD and 1SF

GM factory document — 2025 cadillac xt6 fleet order guide, p.7.

This page aggregates every documented appearance of 1SC in the Cadillac reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.