6.6L Duramax Diesel engine being placed in chassis at engine set for GM’s Heavy Duty pickups. General Motors Flint Assembly/UAW Local 598 in Flint, Michigan. (Photo: General Motors)

6.6L Duramax Diesel engine being placed in chassis at engine set for GM’s Heavy Duty pickups. General Motors Flint Assembly/UAW Local 598 in Flint, Michigan. (Photo: General Motors)

General Motors rolled its 2 millionth Duramax 6.6L V-8 turbo-diesel engine off of the line today at its DMAX, Ltd. plant.