M12 ✓ Factory-verified

Cadillac · Regular Production Option

Transmission, manual 6 speed, Tremec, 85 mm, 2.97 1st, 0.57 6th, O/D

Years 2004–07 Models 1 Factory citations 2

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Also documented for ChevroletPontiac

Documented applications

CTS — Sigma / GMX320 (2003–2007) →

• 2004–2007 ✓ Factory-verified

  only in: CTS-V (Wikipedia). The 2007 list adds a 0.84 5th gear ratio.

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

  ⛭ GM factory document — 2007 cadillac cts rpo code list, p.1.

This page aggregates every documented appearance of M12 in the Cadillac reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.