Brake system, heavy duty

Years 1998–09, 2014–15, 2017–18, 2025–26 Models 10 Factory citations 25

Also described as Brakes, Brembo front, performance, 4-wheel antilock, 4-wheel discBrakes, Brembo front, V PerformanceBrakes, 4-wheel antilock, 4-wheel disc

Also documented for Chevrolet GMC

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

V-Series: S; Sport: O; the CT4-V lists add "performance 4-wheel antilock, 4-wheel disc" to the wording

GM factory document — 2025 cadillac ct4 fleet order guide, p.14.
GM factory document — 2025 cadillac ct4 v ct4 v blackwing fleet order guide, p.6.
GM factory document — 2026 cadillac ct4 fleet order guide, p.13.
GM factory document — 2026 cadillac ct4 v ct4 v blackwing fleet order guide, p.7.

CT6 — Omega (2016–2020)

2017 Factory-verified

CT6 2.0L RWD, Luxury 2.0L RWD: S; 3.6L AWD trims: not available

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

CTS — Sigma II (2008–2015)

2008–2009, 2014 Factory-verified

The 2014 Coupe guide calls it the performance 4-wheel antilock disc brakes; rear-wheel-drive Performance and Premium: O (in Y43)

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.

DeVille — G-body (2000–2005)

2000–2005 Factory-verified

GM factory document — 2000 cadillac deville rpo code list, p.1.
GM factory document — 2005 cadillac deville rpo code list, p.1.

DeVille — K-body (1994–1999)

1998–1999 Factory-verified

GM factory document — 1998 cadillac deville rpo code list, p.1.
GM factory document — 1999 cadillac deville rpo code list, p.1.

DTS — G-body (2006–2011)

2006–2009 Factory-verified

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

Eldorado — E-body (1992–2002)

1998–2000 Factory-verified

GM factory document — 1998 cadillac eldorado rpo code list, p.1.
GM factory document — 1999 cadillac eldorado rpo code list, p.1.
GM factory document — 2000 cadillac eldorado rpo code list, p.1.

Seville — G-body (1998–2004)

1998–1999 Factory-verified

GM factory document — 1998 cadillac seville rpo code list, p.1.
GM factory document — 1999 cadillac seville rpo code list, p.1.

XLR — Y-body (2004–2009)

2006–2009 Factory-verified

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

This page aggregates every documented appearance of J55 in the Cadillac reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.