NQU ✓ Factory-verified

Cadillac · Regular Production Option

Emission system, Korean, ULEV

Years 2009 Models 2 Factory citations 2

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Documented applications

CTS — Sigma II (2008–2015) →

• 2009 ✓ Factory-verified internal
  ⛭ GM factory document — 2009 cadillac cts rpo code list, p.1.

STS — Sigma (2005–2011) →

• 2009 ✓ Factory-verified internal
  ⛭ GM factory document — 2009 cadillac sts rpo code list, p.1.

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