GM Flint assembly plant video of the new 2020 HD's going down the production line. New 6.6L DI gas engine with 401 hp and 464 ft lbs of torque is the new gas engine replacing the 6.0L gas.
https://youtu.be/pZJQDwUmLAU
Video of the HD's reveal in Detroit from Pickup Truck Plus Suv Talk.
https://youtu.be/6SPyjpRbj6U