Would be happy to chat with any one who would like to know more about a 2500 Suburban with Quadrasteer, trailer mirrors and a 4.10 rear end. I ordered mine specifically to pull our 27 foot Overlander. Our 4x4 2500 is rated for a max trailer of 9300# with a GCWR of 16,000 lbs.
Please feel free to ask any questions, but from not reading the article it appears that the reviewer did not do his home work. I think that 325 hp and 365 of torque from the 6000 vortex is plenty. The 8100 vortex has a max trailer of 12,000 and a gcwr of 19,000.
As far as gas vs diesel , I think that the one you are driving is the right one for you
ps 4.10 rear end is a $50 factory option
the retractable camper mirrors $175.
second row captain's chairs $490.
block heater $35. (poor man's garage)