M33 ✓ Factory-verified

GMC · Regular Production Option

Transmission, 4-speed automatic, Hydra-Matic 4L60-E, hybrid

Years 2004–07 Models 1 Factory citations 2

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Also documented for Chevrolet

Documented applications

Sierra — GMT800 (1999–2007) →

• 2004–2007 ✓ Factory-verified
  ⛭ GM factory document — 2004 gmc gmc c sierra 2wd rpo code list, p.1.

  ⛭ GM factory document — 2007 gmc sierra classic 2wd rpo code list, p.1.

This page aggregates every documented appearance of M33 in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.