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The 2011–2016 LML Duramax delivered more horsepower, torque, and refinement than ever before, becoming one of the most trusted engines in GM’s heavy-duty lineup. Designed for Silverado and Sierra 2500HD and 3500HD trucks, the LML features high-pressure injection, improved turbo design, and advanced electronics. With strong reliability and tuning potential, the LML remains a favorite among Duramax enthusiasts. Thoroughbred Diesel offers everything from filters and tuners to injectors and turbos to keep your LML performing at its best.
Our selection of 2011–2016 LML Duramax parts includes the most trusted upgrades and maintenance products available. Many owners choose cold air intakes from S&B and AFE for better airflow, Edge Insight CTS3 monitors for engine data and performance tracking, and ARP head studs for long-term reliability. Popular performance additions include Fleece Performance turbochargers, PPEI tuning support, MBRP exhaust systems, and lift pumps from FASS or AirDog to ensure consistent fueling under load. For maintenance, we carry OEM-quality filters, gaskets, and cooling system components designed to keep your LML running strong for years to come.
Whether you drive a Silverado 2500HD, Sierra 3500HD, or a tuned performance truck, Thoroughbred Diesel has the parts, brands, and experience to help you get the most out of your 6.6L LML Duramax. Shop by department, browse trusted brands, or explore our featured upgrades below — everything you need for your 2011–2016 LML is right here.
The **2011–2016 LML Duramax** delivered major improvements in horsepower, torque, and emissions control for GM’s heavy-duty trucks. These Thoroughbred Diesel videos cover tuning options, maintenance insights, and performance upgrades to keep your LML running strong and efficient.