YF5 Factory-verified

Cadillac · Regular Production Option

Emissions, California state requirements

Years 2000, 2005–09, 2014–19, 2023, 2025–27 Models 24 Factory citations 62

Also described as Certification, emission, CaliforniaEmissions, CaliforniaCertification, control, electronic throttleCertification emission, California

Also documented for Buick Chevrolet GMC Hummer Oldsmobile Pontiac Saturn

Documented applications

ATS — Alpha (2013–2019)

2014–2015, 2018 Factory-verified internal

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.
GM factory document — 2018 cadillac ats v fleet order guide wayback, p.4.

Catera — V-body (1997–2001)

2000 Factory-verified internal

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

CT4 — Alpha 2 (2020–2026)

2025–2026 Factory-verified internal

all trims: O

GM factory document — 2025 cadillac ct4 fleet order guide, p.15.
GM factory document — 2025 cadillac ct4 v ct4 v blackwing fleet order guide, p.16.
GM factory document — 2026 cadillac ct4 fleet order guide, p.14.
GM factory document — 2026 cadillac ct4 v ct4 v blackwing fleet order guide, p.15.

CT5 — Alpha 2 (2020–2026)

2025–2026 Factory-verified internal

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.

CT6 — Omega (2016–2020)

2017–2019 Factory-verified internal

; all trims: O; 2018 and 2019 from the 2018 and 2019 CT6 order guides (GM documents)

GM factory document — 2017 cadillac ct6 fleet order guide wayback, p.4.
GM factory document — 2018 cadillac ct6 order guide copy gm authority, p.57, p.60.
GM factory document — 2019 cadillac ct6 order guide copy gm authority, p.51, p.54.

CTS — Alpha (2014–2019)

2014–2015, 2018 Factory-verified internal

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.

CTS — Sigma II (2008–2015)

2008–2009, 2014 Factory-verified internal

The 2014 guides list it as California emissions; every 2014 coupe and the CTS-V Sedan: O

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

CTS — Sigma / GMX320 (2003–2007)

2007 Factory-verified internal

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

DTS — G-body (2006–2011)

2006–2009 Factory-verified internal

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

Escalade EXT — GMT900 (2007–2013)

2007–2009 Factory-verified internal

GM factory document — 2007 cadillac escalade ext rpo code list, p.1.
GM factory document — 2009 cadillac escalade ext rpo code list, p.1.

Escalade — GMT900 (2007–2014)

2007–2009 Factory-verified internal

GM factory document — 2007 cadillac escalade rpo code list, p.1.
GM factory document — 2009 cadillac escalade rpo code list, p.1.

Escalade IQ — Ultium BEV (2025–2027)

2025–2027 Factory-verified internal

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

Escalade — K2XX (2015–2020)

2015–2017 Factory-verified internal

GM factory document — 2015 cadillac escalade fleet order guide wayback, p.4.
GM factory document — 2016 chevrolet escalade escalade esv suburban tahoe yukon yukon xl electrical body builders manual service manual 2016 en us, p.19.
GM factory document — 2017 chevrolet escalade escalade esv suburban tahoe yukon yukon xl electrical body builders manual service manual 2017 en us 1, p.39.

Escalade — T1XX, 5th gen (2021–2027)

2023, 2025–2027 Factory-verified internal

GM factory document — 2023 cadillac 23 escalade escalade esv electrical body builder sm en us 2022oct25, p.14.
GM factory document — 2025 cadillac new escalade escalade v fleet order guide, p.17.
GM factory document — 2027 cadillac escalade escalade v fleet order guide, p.19.

Lyriq — BEV3 (2023–2027)

2025–2027 Factory-verified internal

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

Optiq — BEV3 (2025–2027)

2025–2027 Factory-verified internal

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.

SRX — Sigma / GMT265 (2004–2009)

2007–2009 Factory-verified internal

GM factory document — 2007 cadillac srx rpo code list, p.1.
GM factory document — 2009 cadillac srx rpo code list, p.1.

SRX — Theta Premium / GMT166 (2010–2016)

2016 Confirmed internal

; all trims: O; GM's 2016 SRX order guide (GM Authority's copy, published September 18, 2015)

STS — Sigma (2005–2011)

2007, 2008 Factory-verified internal

The 2009 list prints California emission certification (separate row).

GM factory document — 2007 cadillac sts rpo code list, p.1.
GM factory document — 2008 cadillac sts rpo code list, p.1.
2009 Factory-verified internal

The 2007 and 2008 lists print electronic throttle control certification (separate row).

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

Vistiq — BEV3 (2026–2027)

2026–2027 Factory-verified internal

GM factory document — 2026 cadillac all electric vistiq fleet order guide, p.57.
GM factory document — 2027 cadillac all electric vistiq fleet order guide, p.57.

XLR — Y-body (2004–2009)

2005–2009 Factory-verified internal

GM factory document — 2005 cadillac xlr rpo code list, p.1.
GM factory document — 2009 cadillac xlr rpo code list, p.1.

XT4 — E2 (2019–2025)

2025 Factory-verified internal

Premium Luxury, Sport: O

GM factory document — 2025 cadillac xt4 fleet order guide, p.11.
GM factory document — 2025 cadillac xt4 fleet order guide rpo codes, p.1.

XT5 — C1XX (2017–2026)

2025–2026 Factory-verified internal

; all trims: O

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.15.
GM factory document — 2025 cadillac xt5 fleet order guide, p.34.
GM factory document — 2026 cadillac xt5 fleet order guide, p.16.
GM factory document — 2026 cadillac xt5 fleet order guide, p.35.

XT6 — C1XX (2020–2025)

2025 Factory-verified internal

; All trims: O

GM factory document — 2025 cadillac xt6 fleet order guide, p.17.
GM factory document — 2025 cadillac xt6 fleet order guide, p.66.

This page aggregates every documented appearance of YF5 in the Cadillac reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.