LLY Duramax Cold Air Intake Ultimate Guide
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LLY Duramax Cold Air Intake Ultimate Guide

General Motors/Chevrolet produced the Duramax LLY 6.6L diesel V8 engine from 2004–2006. Depending on the mode, it produced 210–310 horsepower and 520–605 lb-ft of torque. It was the replacement for the LB7 V8 diesel engine, and was soon succeeded by the LBZ V8 diesel engine. While at the time, its 210–310 horsepower figure was decent,…

LMM Duramax Tuner Guide
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LMM Duramax Tuner Guide

From 2007–2010, the General Motors/Chevrolet Duramax LMM was one of the top V8 diesel engines on the market. Powering heavy duty trucks, SUVs, and vans, the Duramax LMM is essentially a Duramax LBZ but with some updated emissions equipment. Depending on the year and model, the Duramax LMM makes 250–365 horsepower and 460–660 lb-ft of…

The 5 Best Duramax LBZ Mods
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The 5 Best Duramax LBZ Mods

The LBZ succeeded the LLY engine in 2006 and was short lived, being replaced by the LMM in mid-2007. Some notable changes included an upgraded CP3 fuel pump for higher rail pressure and a lower compression ratio which eliminated issues with connecting rod failure in modified LLY’s. Part of the reason for the short life…

Duramax LML EGR Delete Guide
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Duramax LML EGR Delete Guide

Aside from the DPF filter and other exhaust-related emissions systems, the Duramax LML also has an EGR system. EGR stands for exhaust gas recirculation, which essentially routes exhaust gases back into the engine. EGR systems have a few components, most notably the EGR cooler, than are prone to failure. Additionally, it’s bad for engine longevity….