GT5 ✓ Factory-verified

Buick · Regular Production Option

Axle, rear, 4.10 ratio

Years 2004–07 Models 1 Factory citations 2

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Also documented for CadillacChevroletGMCHummerOldsmobile

Documented applications

Rainier — GMT360 (2004–2007) →

• 2004–2007 ✓ Factory-verified

  the 2004 lists add a remark that it duplicates GT8

  ⛭ GM factory document — 2004 buick rainier 2wd rpo code list, p.1.

  ⛭ GM factory document — 2007 buick rainier rpo code list, p.1.

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