K1O ✓ Factory-verified

Cadillac · Regular Production Option

Engine air filter monitor

Years 2023, 2025–27 Models 1 Factory citations 3

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Also documented for BuickChevroletGMC

Documented applications

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.

Related codes · mentioned in these notes

S

This page aggregates every documented appearance of K1O in the Cadillac reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.