M12 ✓ Factory-verified

Pontiac · Regular Production Option

Transmission, manual 6 speed, Tremec, 85 mm, 2.97 first, 0.84 fifth, 0.57 sixth, overdrive

Years 2004–06 Models 1 Factory citations 2

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Also documented for CadillacChevrolet

Documented applications

GTO — Fifth generation (2004–2006) →

• 2004–2006 ✓ Factory-verified

  The 2004 list prints the same gearbox without the fifth-gear ratio.

  ⛭ GM factory document — 2004 pontiac gto rpo code list, p.1.

  ⛭ GM factory document — 2006 pontiac gto rpo code list, p.1.

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