Y4N ✓ Factory-verified

Cadillac · Regular Production Option

Technology package

Years 2025–26 Models 2 Factory citations 8

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Documented applications

XT5 — C1XX (2017–2026) →

• 2025–2026 ✓ Factory-verified

  2025: Premium Luxury, Sport: O; Luxury: not available; 2026: Premium Luxury, Sport: S; Luxury: not available

  ⛭ GM factory document — 2025 cadillac xt5 fleet order guide rpo codes, p.1.

  ⛭ GM factory document — 2026 cadillac xt5 fleet order guide rpo codes, p.1.

  ⛭ GM factory document — 2025 cadillac xt5 fleet order guide, p.11.

  ⛭ GM factory document — 2025 cadillac xt5 fleet order guide, p.18.

  ⛭ GM factory document — 2026 cadillac xt5 fleet order guide, p.1.

  ⛭ GM factory document — 2026 cadillac xt5 fleet order guide, p.19.

XT6 — C1XX (2020–2025) →

• 2025 ✓ Factory-verified

  Premium Luxury: O; Sport: O; upgrades UDD to UHS, DD8 to DRZ and UD5 to UKG

  ⛭ GM factory document — 2025 cadillac xt6 fleet order guide, p.12.

  ⛭ GM factory document — 2025 cadillac xt6 fleet order guide, p.66.

Related codes · mentioned in these notes

DD8DRZOSUD5UDDUHSUKG

This page aggregates every documented appearance of Y4N in the Cadillac reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.