Transmission, automatic, 6 speed, Allison, LCT 1000, 3.10 first gear, 0.71 fifth gear, 0.62 sixth gear, overdrive, converter clutch

Years 2006–09, 2014–15, 2018–19 Models 4 Factory citations 11

Also described as Transmission, 6 speed automatic, Allison LCT 1000, 3.10 first gear, 0.71 fifth gear, 0.62 sixth gear, overdrive, converter clutchTransmission, Allison 1000 6 speed automatic, electronically controlled

Also documented for Chevrolet

Documented applications

Sierra — GMT900 (2007–2013)

2009 Factory-verified

GM factory document — 2009 gmc sierra 2wd rpo code list, p.1.

Sierra HD — GMT800 (2001–2007)

2006–2007 Factory-verified

GM prints the converter clutch as Conv Clutch

GM factory document — 2006 gmc gmc c sierra 2wd rpo code list, p.1.
GM factory document — 2007 gmc sierra classic 2wd rpo code list, p.1.

Sierra HD — GMT900 (2007–2014)

2007–2009, 2014 Factory-verified

the 2014 guides call it the Allison 1000 6 speed automatic; requires LML in 2014

GM factory document — 2007 gmc sierra 2wd rpo code list, p.1.
GM factory document — 2008 gmc sierra 2wd rpo code list, p.1.
GM factory document — 2009 gmc sierra 2wd rpo code list, p.1.
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, 2018–2019 Factory-verified

overdrive, electronic engine grade braking and tow/haul mode; with the Duramax diesel (LML in 2015, L5P in 2018 and 2019); 2015 marks: Sierra, SLE, SLT: O; 2018: GM's 2018 Sierra 2500HD order guide; 2019: GM's 2019 Sierra 3500HD order guide

GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.4.
GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.26.
GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.25.

This page aggregates every documented appearance of MW7 in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.