GW1 ✓ Factory-verified

Cadillac · Regular Production Option

Axle, rear, 3.91 ratio

Years 2003–09 Models 2 Factory citations 4

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Also documented for ChevroletPontiacSaturn

Documented applications

CTS — Sigma / GMX320 (2003–2007) →

• 2003–2004 ✓ Factory-verified
  ⛭ GM factory document — 2003 cadillac cts rpo code list, p.1.

  ⛭ GM factory document — 2004 cadillac cts rpo code list, p.1.

SRX — Sigma / GMT265 (2004–2009) →

• 2004–2009 ✓ Factory-verified
  ⛭ GM factory document — 2004 cadillac srx rpo code list, p.1.

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

This page aggregates every documented appearance of GW1 in the Cadillac reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.