Headlamps, high intensity discharge, Adaptive Forward Lighting, LED vertical light signatures

Years 2014–15, 2017–18 Models 4 Factory citations 10

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Also described as Headlamps, high intensity discharge, Adaptive Forward LightingHeadlamps, high intensity discharge

Also documented for Buick Chevrolet GMC

Documented applications

ATS — Alpha (2013–2019)

2014–2015, 2018 Factory-verified

the ATS-V guide prints only high intensity discharge

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.

CTS — Alpha (2014–2019)

2014–2015, 2018 Factory-verified

Vsport, Vsport Premium: S

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)

2014 Factory-verified

CTS-V Coupe, CTS-V Sedan: S

GM factory document — 2014 cadillac cts coupe and cts v coupe fleet order guide wayback, p.2.
GM factory document — 2014 cadillac cts v sedan fleet order guide wayback, p.3.

XTS — Epsilon II, enlarged (2013–2019)

2017 Confirmed

the 2018 list deletes it, replaced by LED headlamps T4L (GM Authority 2018 XTS changes)

This page aggregates every documented appearance of T4F in the Cadillac reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.