6.6L Duramax Diesel VIN ID Chart

Applicable Model Year(s) | 8th Digit of VIN | 6.6L Duramax Engine Variation |
2001 - 2004 | 1 | LB7 |
2 | LLY (introduced mid-year 2004) | |
2005 | 2 | LLY |
2006 | 2 | LLY (2006 variant) [1] |
D | LBZ (introduced late 2006) | |
2007 | D | LBZ |
6 | LMM | |
2008 - 2010 | 6 | LMM |
2011 - 2016 | 8 | LML |
L | LGH [2] | |
2017 - 2021 | Y | L5P |
[1] 2006 LLY differs greatly from 2004/2005 model; lack of part compatibility between 2004/2005 and 2006 model year LLY.
[2] LGH found in Chevrolet/GMC chassis cabs and Savana/Express van applications only; not available in pickup models.