GU2 ✓ Factory-verified

Cadillac · Regular Production Option

Axle, rear, 2.73 ratio

Years 2005–09 Models 3 Factory citations 5

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Also documented for ChevroletGMCPontiac

Documented applications

CTS — Sigma / GMX320 (2003–2007) →

• 2005 ✓ Factory-verified

  2005 list only; also on the 2005 STS list.

  ⛭ GM factory document — 2005 cadillac cts rpo code list, p.1.

STS — Sigma (2005–2011) →

• 2005–2009 ✓ Factory-verified
  ⛭ GM factory document — 2005 cadillac sts rpo code list, p.1.

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

XLR — Y-body (2004–2009) →

• 2007–2009 ✓ Factory-verified
  ⛭ GM factory document — 2007 cadillac xlr rpo code list, p.1.

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

This page aggregates every documented appearance of GU2 in the Cadillac reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.