Nicknamed the “baby Duramax,” the new LZ0 is essentially the second generation of GM’s 3.0L turbodiesel engine, bringing with it enhanced performance and efficiency. Output is rated at 305 ...

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 ...

It's good for 401 horsepower and 464 lb-ft of torque. Optional is the 6.6-liter Duramax V8 turbo-diesel, nudging power up to 470 hp, but more importantly giving torque a massive shove to 975 lb-ft.