Engine, diesel, 8 cylinder, 6.6L, DPI, V8, Duramax

Years 2006–10 Models 2 Factory citations 8

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Also documented for GMC

Documented applications

Express — GMT610 (2003–2027)

2006–2010 Factory-verified

GM factory document — 2006 chevrolet express rpo code list, p.1.
GM factory document — 2007 chevrolet express awd rpo code list, p.1.
GM factory document — 2008 chevrolet express rpo code list, p.1.
GM factory document — 2009 chevrolet express rpo code list, p.1.
GM factory document — 2010 chevrolet gh van elec 1 7 d1 100813, p.13.

Silverado HD — GMT900 (2007–2014)

2007–2009 Factory-verified

the 2014 guide prints LML instead

GM factory document — 2007 chevrolet silverado 2wd rpo code list, p.1.
GM factory document — 2008 chevrolet silverado 2wd rpo code list, p.1.
GM factory document — 2009 chevrolet silverado 2wd rpo code list, p.1.
2010 Single-source

GM Authority's LMM engine page gives the Silverado HD LMM through the 2010 model year; no GM list in the repository covers 2010

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