LB7 ✓ Factory-verified

GMC · Regular Production Option

Engine, diesel, 8 cylinder, 6.6L, direct injection, V8, turbocharged, high output, Duramax

Years 2001–04 Models 1 Factory citations 4

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Also documented for Chevrolet

Documented applications

Sierra HD — GMT800 (2001–2007) →

• 2001–2004 ✓ Factory-verified

  the 2001–2002 lists print the size as 6.6 without the L

  ⛭ GM factory document — 2001 gmc gmc c sierra 2wd rpo code list, p.1.

  ⛭ GM factory document — 2002 gmc gmc c sierra 2wd rpo code list, p.1.

  ⛭ GM factory document — 2003 gmc gmc c sierra 2wd rpo code list, p.1.

  ⛭ GM factory document — 2004 gmc gmc c sierra 2wd rpo code list, p.1.

This page aggregates every documented appearance of LB7 in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.