The 3.0 turbodiesels are also a $1000 upgrade in the mercedes E class or M class, compared with the 3.5L V6....
The grand cherokee is a good window into what will be likely for the 1/2 tons:
The diesel costs $1000 over a hemi. Both make around 380-ish ft-lbs of torque, the Hemi makes around 335HP, the diesel around 210HP. The diesel is ~1 second slower in 0-60 times, and gets ~30% better fuel economy. At those prices, they've made up the cost difference in less than 2 years for most people.