General Motors’ Duramax diesel engine lineup has been powering GM trucks and SUVs and enthralling gearheads since its original release in 2001. While the most famous member of the Duramax roster is the 6.6-liter V8 found in GM’s heavy-duty pickup and SUV lines, it’s not the only motor to get the Duramax badge. Smaller Duramax engines — including two 2.8-liter engines and one 2.5-liter engine — were released in 2011, 2012, and 2014. However, the real game-changer came in
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