Charging module, 11.5 kW AC

Years 2023, 2025–27 Models 4 Factory citations 10

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Also documented for Chevrolet GMC

Documented applications

Escalade IQ — Ultium BEV (2025–2027)

2025–2026 Factory-verified

2026 guide: Luxury, Sport: S

GM factory document — 2025 cadillac all electric escalade iq fleet order guide rpo codes, p.1.
GM factory document — 2026 cadillac all electric escalade iql fleet order guide rpo codes, p.1.
GM factory document — 2026 cadillac all electric escalade iql fleet order guide, p.7.

Lyriq — BEV3 (2023–2027)

2023, 2025–2027 Factory-verified

the 2023 list adds 120V/15A to 240V/60A charging; 2023: AWD (1SD): S; RWD (1SE): not available; 2025: all trims: S; 2026–2027: only in: Luxury trims, Sport trims, LYRIQ-V (1SV) (S); Professional Vehicle (S)

GM factory document — 2023 cadillac all new electric lyriq fleet order guide wayback, p.3.
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

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.

Vistiq — BEV3 (2026–2027)

2026–2027 Factory-verified

Luxury, Sport: S

GM factory document — 2026 cadillac all electric vistiq fleet order guide, p.54.
GM factory document — 2027 cadillac all electric vistiq fleet order guide, p.54.

This page aggregates every documented appearance of K28 in the Cadillac reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.