Engine oil cooling, heavy-duty

Years 1999–00, 2002–09, 2014–18, 2023, 2025–27 Models 10 Factory citations 22

Also described as Cooling, external engine oil coolerEngine oil cooling, heavy dutyCooling system, engine oilCooling, external engine oil cooler, heavy-dutyEngine oil cooler, external

Also documented for Buick Chevrolet GMC Hummer Oldsmobile Pontiac Saturn

Documented applications

ATS — Alpha (2013–2019)

2014, 2018 Factory-verified

GM factory document — 2014 cadillac ats fleet order guide wayback, p.11.
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.

Escalade EXT — GMT800 (2002–2006)

2002–2006 Factory-verified

GM factory document — 2002 cadillac escalade ext rpo code list, p.1.
GM factory document — 2006 cadillac escalade ext rpo code list, p.1.

Escalade EXT — GMT900 (2007–2013)

2007–2009 Factory-verified

The 2009 list words it as cooling system, engine oil.

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 — GMT400-based, GMT435 (1999–2000)

1999–2000 Factory-verified

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

Escalade — GMT800 (2002–2006)

2002–2006 Factory-verified

GM factory document — 2002 cadillac escalade 2wd rpo code list, p.1.
GM factory document — 2006 cadillac escalade rpo code list, p.1.

Escalade — GMT900 (2007–2014)

2007–2009 Factory-verified

The 2009 list words it as cooling system, engine oil.

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

Escalade — K2XX (2015–2020)

2015–2017 Factory-verified

2015: S on all trims

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.10.
GM factory document — 2017 chevrolet escalade escalade esv suburban tahoe yukon yukon xl electrical body builders manual service manual 2017 en us 1, p.22.

Escalade — T1XX, 5th gen (2021–2027)

2023, 2025–2027 Factory-verified

2027: S on all trims

GM factory document — 2023 cadillac 23 escalade escalade esv electrical body builder sm en us 2022oct25, p.11.
GM factory document — 2025 cadillac new escalade escalade v fleet order guide, p.7.
GM factory document — 2027 cadillac escalade escalade v fleet order guide, p.9.

SRX — Sigma / GMT265 (2004–2009)

2004 Factory-verified

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

STS — Sigma (2005–2011)

2007–2009 Factory-verified

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

This page aggregates every documented appearance of KC4 in the Cadillac reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.