FE2 Factory-verified

Cadillac · Regular Production Option

Suspension, ride and handling

Years 2004–09, 2014–16, 2018, 2025–27 Models 10 Factory citations 30

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Also described as Suspension, sportSuspension system, ride, handlingSuspension, 4-wheel independent

Also documented for Buick Chevrolet GMC Oldsmobile Pontiac Saturn

Documented applications

ATS — Alpha (2013–2019)

2014–2015, 2018 Factory-verified

GM factory document — 2014 cadillac ats fleet order guide wayback, p.10.
GM factory document — 2015 cadillac ats coupe fleet order guide wayback, p.4.
GM factory document — 2018 cadillac ats coupe fleet order guide wayback, p.4.
GM factory document — 2018 cadillac ats sedan fleet order guide wayback, p.4.

CT4 — Alpha 2 (2020–2026)

2025–2026 Factory-verified

only in: CT4; all trims: S

GM factory document — 2025 cadillac ct4 fleet order guide, p.7.
GM factory document — 2026 cadillac ct4 fleet order guide, p.7.

CT5 — Alpha 2 (2020–2026)

2025–2026 Factory-verified

only in: CT5 (Premium Luxury, Sport); Premium Luxury, Sport: S

GM factory document — 2025 cadillac ct5 fleet order guide rpo codes, p.1.
GM factory document — 2026 cadillac ct5 fleet order guide rpo codes, p.1.
GM factory document — 2025 cadillac ct5 fleet order guide, p.7.
GM factory document — 2026 cadillac ct5 fleet order guide, p.7.

CTS — Sigma II (2008–2015)

2008–2009, 2014 Factory-verified

The 2014 Coupe guide calls it the sport suspension; CTS Coupe, Performance, Premium: S

GM factory document — 2008 cadillac cts rpo code list, p.1.
GM factory document — 2009 cadillac cts rpo code list, p.1.
GM factory document — 2014 cadillac cts coupe and cts v coupe fleet order guide wayback, p.3.

CTS — Sigma / GMX320 (2003–2007)

2005–2007 Factory-verified

GM factory document — 2005 cadillac cts rpo code list, p.1.
GM factory document — 2007 cadillac cts rpo code list, p.1.

Optiq — BEV3 (2025–2027)

2025–2027 Factory-verified

2025: all trims S; 2026–2027: Luxury, Premium Luxury, Sport, Premium Sport: S; V-Series: 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.6.
GM factory document — 2026 cadillac all electric optiq optiq v fleet order guide, p.9.
GM factory document — 2027 cadillac all electric optiq optiq v fleet order guide, p.10.

SRX — Theta Premium / GMT166 (2010–2016)

2016 Confirmed

FWD: S on all trims; AWD: S on Luxury Collection; GM's 2016 SRX order guide (GM Authority's copy, published September 18, 2015)

XLR — Y-body (2004–2009)

2004–2009 Factory-verified

GM factory document — 2004 cadillac xlr rpo code list, p.1.
GM factory document — 2009 cadillac xlr rpo code list, p.1.

XT5 — C1XX (2017–2026)

2025–2026 Factory-verified

Luxury, Premium Luxury: S; Sport: not available

GM factory document — 2025 cadillac xt5 fleet order guide rpo codes, p.1.
GM factory document — 2026 cadillac xt5 professional vehicles fleet order guide rpo codes, p.1.
GM factory document — 2025 cadillac xt5 fleet order guide, p.8.
GM factory document — 2025 cadillac xt5 fleet order guide, p.36.
GM factory document — 2026 cadillac xt5 fleet order guide, p.10.
GM factory document — 2026 cadillac xt5 fleet order guide, p.37.

XT6 — C1XX (2020–2025)

2025 Factory-verified

Luxury: S; Premium Luxury: S; upgrades to FE5 with UKL or JSE

GM factory document — 2025 cadillac xt6 fleet order guide, p.8.
GM factory document — 2025 cadillac xt6 fleet order guide, p.62.

This page aggregates every documented appearance of FE2 in the Cadillac reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.