PB4 Factory-verified

Cadillac · Regular Production Option

Wheel lugs, locking

Years 2003–09, 2014–15, 2018, 2025–27 Models 11 Factory citations 32

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Also described as Lock control, wheel

Also documented for Buick Chevrolet GMC Oldsmobile Pontiac

Documented applications

ATS — Alpha (2013–2019)

2014–2015, 2018 Factory-verified

GM factory document — 2014 cadillac ats fleet order guide wayback, p.7.
GM factory document — 2015 cadillac ats coupe fleet order guide wayback, p.3.
GM factory document — 2018 cadillac ats coupe fleet order guide wayback, p.3.
GM factory document — 2018 cadillac ats sedan fleet order guide wayback, p.3.
GM factory document — 2018 cadillac ats v fleet order guide wayback, p.3.

CT5 — Alpha 2 (2020–2026)

2025–2026 Factory-verified

only in: CT5-V, CT5-V Blackwing; V-Series: not available; V-Series Blackwing: S

GM factory document — 2025 cadillac ct5 v ct5 v blackwing 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.

CTS — Alpha (2014–2019)

2014–2015, 2018 Factory-verified

Vsport: not available

GM factory document — 2014 cadillac cts sedan fleet order guide wayback, p.3.
GM factory document — 2015 cadillac cts sedan fleet order guide wayback, p.3.
GM factory document — 2018 cadillac cts sedan fleet order guide wayback, p.3.

CTS — Sigma II (2008–2015)

2008–2009 Factory-verified

GM factory document — 2008 cadillac cts rpo code list, p.1.
GM factory document — 2009 cadillac cts rpo code list, p.1.

CTS — Sigma / GMX320 (2003–2007)

2003–2007 Factory-verified

GM factory document — 2003 cadillac cts rpo code list, p.1.
GM factory document — 2007 cadillac cts rpo code list, p.1.

Lyriq — BEV3 (2023–2027)

2025–2027 Factory-verified

2025: only in: Signature Luxury (1SE), Signature Sport (1SK) (S); 2026–2027: only in: Signature Luxury (1SE), Signature Sport (1SK), LYRIQ-V trims (S)

GM factory document — 2025 cadillac all electric lyriq fleet order guide rpo codes, p.1.
GM factory document — 2027 cadillac all electric lyriq lyriq v fleet order guide rpo codes, p.1.

SRX — Sigma / GMT265 (2004–2009)

2004–2009 Factory-verified

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

Vistiq — BEV3 (2026–2027)

2026–2027 Factory-verified

all trims: S

GM factory document — 2026 cadillac all electric vistiq fleet order guide, p.55.
GM factory document — 2027 cadillac all electric vistiq fleet order guide, p.55.

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.7.
GM factory document — 2025 cadillac xt5 fleet order guide, p.32.
GM factory document — 2026 cadillac xt5 fleet order guide, p.8.
GM factory document — 2026 cadillac xt5 fleet order guide, p.33.

XT6 — C1XX (2020–2025)

2025 Factory-verified

Premium Luxury: S; Sport: S

GM factory document — 2025 cadillac xt6 fleet order guide, p.7.
GM factory document — 2025 cadillac xt6 fleet order guide, p.63.

This page aggregates every documented appearance of PB4 in the Cadillac reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.