Duramax LML vs. LMM Engine Differences
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Duramax LML vs. LMM Engine Differences

The LML engine got a major overhaul in 2011, compared to the previous LMM Duramax engine. It featured nearly 60% freshly designed parts, only leveraging a portion of the previous engine design. Up to this point, all of the previous Duramax’s had some internal weaknesses and common problems with bending rods and cracking pistons. The…

Duramax LMM Tuning Guide
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Duramax LMM Tuning Guide

Engine tuning is the best performance upgrade for a Duramax LMM. A simple plug-and-play tuner, or custom tuning, can easily add over 100+ horsepower and 200+ torque. Additionally, you get a number of other benefits like increased gas mileage, better towing, transmission tuning capabilities, and a more efficient engine overall. There are a lot of…

The 5 Most Common LMM Duramax 6.6L Engine Problems
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The 5 Most Common LMM Duramax 6.6L Engine Problems

GM launched the LMM in 2007.5, replacing the LBZ due to tighter emissions regulations. To strengthen emissions active regeneration was added alongside a DPF system. As is common with emissions equipment, this led to a new common problem for the Duramax LMM engine. Similar to its predecessor, the LMM has very few actual engine problems….