He's pretty much right. Ive driven and towed with all 3, in my experiences: 1. If you want a daily driver diesel, get a duramax 2. If you tow constantly, get a Cummins 3. If you want a truck some where in the middle of what I just said, get a Powerstroke.

I dont want this to turn into who's diesel dick is bigger, thats just based on my experiences with all 3 trucks.