Engine, Duramax 6.6L turbo diesel V8, B20 biodiesel compatible

Years 2014–15 Models 2 Factory citations 3

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Also described as Engine, Duramax 6.6L turbo-diesel V8, B20 diesel compatible

Also documented for Chevrolet

Documented applications

Sierra HD — GMT900 (2007–2014)

2014 Factory-verified

397 hp; requires MW7, includes K40, TUV and K05

GM factory document — 2014 gmc sierra 2500hd fleet order guide wayback, p.4.
GM factory document — 2014 gmc sierra 3500hd fleet order guide wayback, p.4.

Sierra HD — K2XX (2015–2019)

2015 Factory-verified

397 hp (296 kW) at 3000 rpm and 765 lb-ft (1032.8 N-m) at 1600 rpm; requires MW7, GT4 and engine block heater (K05); includes exhaust brake (K40); SLT: also in the Duramax Plus package (PCH); Sierra, SLE, SLT: O

GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.4.

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