GT5 ✓ Factory-verified

Hummer · Regular Production Option

Axle, rear, 4.10 ratio

Years 2003–09 Models 2 Factory citations 4

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Also documented for BuickCadillacChevroletGMCOldsmobile

Documented applications

H2 and H2 SUT — GMT820 (2003–2009) →

• 2003–2008 ✓ Factory-verified

  the 2003–2005 lists mark it a duplicate of GT8 (not in the H2 lists).

  ⛭ GM factory document — 2003 hummer h2 rpo code list, p.1.

  ⛭ GM factory document — 2008 hummer h2 rpo code list, p.1.

H3 and H3T — GMT345 (2006–2010) →

• 2006–2009 ✓ Factory-verified
  ⛭ GM factory document — 2006 hummer h3 rpo code list, p.1.

  ⛭ GM factory document — 2009 hummer h3 rpo code list, p.1.

This page aggregates every documented appearance of GT5 in the Hummer reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.