Its a diesel, if cared for 1,000,000 is easily done. The hemi is covered under the lifetime powertrain, the cummins is not. If you only pull hard a handful of times a year, lifetime may be a nice thought. Its a coin toss in my opinion.

 

CTD all the way, better mpg and life. 2500 4x4 is a lot of truck for a hemi to push.
Youll also get better resale.

 

04 hemi I get 22 mpg at 65 with my 4.7