J56 Factory-verified

Cadillac · Regular Production Option

Brake system, power, front and rear disc, antilock, front and rear wheel, heavy duty

Years 2004–09, 2014–15, 2017–19, 2025–26 Models 8 Factory citations 28

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Also described as Brakes, BremboBrakes, 4-wheel antilock, 4-wheel disc, heavy dutyBrakes, Brembo front performance, 4-wheel antilock, 4-wheel disc

Also documented for Chevrolet

Documented applications

CT5 — Alpha 2 (2020–2026)

2025–2026 Factory-verified

Sport: O; V-Series: S; V-Series Blackwing: not available; the CT5-V lists add V Performance, front

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 v ct5 v blackwing fleet order guide, p.7.
GM factory document — 2026 cadillac ct5 v ct5 v blackwing fleet order guide, p.8.
GM factory document — 2025 cadillac ct5 fleet order guide, p.12.
GM factory document — 2026 cadillac ct5 fleet order guide, p.13.

CT6 — Omega (2016–2020)

2017 Factory-verified

3.6L AWD trims: S; 2.0L RWD trims: not available

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

CTS — Alpha (2014–2019)

2014–2015, 2018–2019 Factory-verified

Vsport, Vsport Premium: S; 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.4.
GM factory document — 2015 cadillac cts sedan fleet order guide wayback, p.4.
GM factory document — 2018 cadillac cts sedan fleet order guide wayback, p.4.
GM factory document — 2019 cadillac cts order guide copy gm authority, p.4.

CTS — Sigma II (2008–2015)

2009, 2014 Factory-verified

The 2014 guides call it Brembo brakes; CTS-V Coupe, CTS-V Sedan: S

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.
GM factory document — 2014 cadillac cts v sedan fleet order guide wayback, p.4.

CTS — Sigma / GMX320 (2003–2007)

2004–2007 Factory-verified

GM's lists for other platforms give J56 other brake wordings; the CTS lists agree on this one.

GM factory document — 2004 cadillac cts rpo code list, p.1.
GM factory document — 2007 cadillac cts rpo code list, p.1.

STS — Sigma (2005–2011)

2006–2009 Factory-verified

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

XT5 — C1XX (2017–2026)

2025–2026 Factory-verified

Sport: S; Luxury, Premium 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.7.
GM factory document — 2025 cadillac xt5 fleet order guide, p.33.
GM factory document — 2026 cadillac xt5 fleet order guide, p.9.
GM factory document — 2026 cadillac xt5 fleet order guide, p.34.

XT6 — C1XX (2020–2025)

2025 Factory-verified

Sport: S

GM factory document — 2025 cadillac xt6 fleet order guide, p.7.
GM factory document — 2025 cadillac xt6 fleet order guide, p.62.

This page aggregates every documented appearance of J56 in the Cadillac reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.