The new redesigned 6.6-liter Duramax V-8 turbocharged diesel engine from General Motors offers 19% more torque than its predecessor along with 38% less noise at idle as well. The engine is also lighter and quieter due to the wider use of aluminum in its construction. (All photos courtesy of GM)
Sean Kilcarr is a former longtime FleetOwner senior editor who wrote for the publication from 2000 to 2018. He served as editor-in-chief from 2017 to 2018.