That changeover occurred just a few years after GM began producing Duramax engines, with the LLY arriving in mid-2004. If you want to figure out which of these Duramax variants is under the hood ...

In the world of diesel engines, the Duramax series by General Motors holds a special place and is known for its robust performance and reliability. However, like many modern diesel engines, the ...

LLY-2004.5 to 2006, VIN code 2LBZ-2006 to 2007, VIN code DLMM-2007.5-present, VIN code 6Though there were evolutionary changes over the years to the engine and controls, most basic component ...

LLY, LBZ, and LMM Duramax Performance Upgrades and More - December 2012 Power Products. The Latest Goodies For Your Rig. Mike McGlothlin Writer Dec 01, 2012. See 1 Photo. 6.0L Power Stroke crate ...

Early in the history of Duramax engines, GM changed the LB7 series of engines to LLY, but it can be difficult to tell them apart. Here’s how.