Before GM introduced its L5P turbodiesels, there was a standout engine that featured enhanced fuel economy and greater dependability than previous iterations from the automaker. The GM LML Duramax Diesel was a sizeable 6.6 liters and was made from 2011 through 2016, available in select Chevy Silverado and GMC Sierra trucks. This brawny brute could generate just under 400 horsepower and over 760-pound feet of torque using design elements like a Variable Vane Turbo system. The LML Duramax was
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