Y53 ✓ Factory-verified

Cadillac · Regular Production Option

Sales package, Cadillac, technology driver awareness

Years 2008–09 Models 1 Factory citations 2

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Documented applications

STS — Sigma (2005–2011) →

• 2008, 2009 ✓ Factory-verified

  The 2008 list omits "Cadillac".

  ⛭ GM factory document — 2008 cadillac sts rpo code list, p.1.

  ⛭ GM factory document — 2009 cadillac sts rpo code list, p.1.

This page aggregates every documented appearance of Y53 in the Cadillac reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.