K12 ✓ Factory-verified

Cadillac · Regular Production Option

Air filter, pollutant

Years 2023, 2025–26 Models 3 Factory citations 14

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Also documented for BuickChevroletGMCOldsmobilePontiac

Documented applications

CT4 — Alpha 2 (2020–2026) →

• 2025–2026 ✓ Factory-verified

  all trims: S

  ⛭ GM factory document — 2025 cadillac ct4 fleet order guide, p.1.

  ⛭ GM factory document — 2025 cadillac ct4 v ct4 v blackwing fleet order guide, p.1.

  ⛭ GM factory document — 2026 cadillac ct4 fleet order guide, p.1.

  ⛭ GM factory document — 2026 cadillac ct4 v ct4 v blackwing fleet order guide, p.1.

CT5 — Alpha 2 (2020–2026) →

• 2023, 2025–2026 ✓ Factory-verified

  Premium Luxury, Sport: S; 2025: V-Series, V-Series Blackwing: S; 2026: V-Series: S; V-Series Blackwing: not available

  ⛭ GM factory document — 2023 cadillac ct5 v ct5 v blackwing fleet order guide wayback, p.1.

  ⛭ 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.

  ⛭ GM factory document — 2025 cadillac ct5 fleet order guide, p.1.

  ⛭ GM factory document — 2026 cadillac ct5 fleet order guide, p.1.

  ⛭ GM factory document — 2025 cadillac ct5 v ct5 v blackwing fleet order guide, p.1.

  ⛭ GM factory document — 2026 cadillac ct5 v ct5 v blackwing fleet order guide, p.1.

Escalade IQ — Ultium BEV (2025–2027) →

• 2025 ✓ Factory-verified
  ⛭ GM factory document — 2025 cadillac all electric escalade iq fleet order guide rpo codes, p.1.

Related codes · mentioned in these notes

SV

This page aggregates every documented appearance of K12 in the Cadillac reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.