Clutch
<---Pass
Being the devils advocate, The point as I see it, the OP asked for real world experience with the little duramax, so far a lot of folks basically seem to be saying, it wont work, I dont have one, dont know anybody with one, never driven one, but it wont work. The OP has an 18 - 20 ft travel trailer, and a 30 foot toy hauler, chances are he is cognizant of the travails of towing, I just took it he was asking about the duramax, not asking permission.
Would be nice to hear some opinions on how it tows. Looking at the specs, it "should" be able to yank around Twinstick's 18' TT like it isn't even back there.
If you're comparing new midsize vs new 1/2-1 Ton, be interesting if the Colorado could get the job done, all the while getting better fuel economy. Say you had a budget of $35-40K...which would be the better buy?