2007 – 2010 6.6L Duramax LMM

The 6.6L Duramax LMM was built to meet the new emission standards mandated for particulate matter (PM) and nitrous oxide (NOx) limits.
The 6.6L Duramax LMM, despite having more stringent emission standards, was able to increase its power output with 365 horsepower and 660 lb-ft of torque. New emission equipment introduced with the launch of the LMM included exhaust gas circulation, a diesel particulate filter and a diesel oxidation catalyst.