6.6 Chevy gas engine

I will add, im tall and it has a lot more room for me in the cab. So everything is bigger. Some might not have these problems, but its nice to atually have head room and to be able to see out the front windsheild. Much better then the gmc 1500 I had. So far for me the 6 speed has not been an issue. But again my TT is light. Towed it on a few long trips this year. All mountains, I had no problems , gas millage was a bit better towing then with the 2012 GMC seirra 5.3 (?) with max tow package. I had plenty of power to pass in the deleware water gap area. With the 1500 I had to slow down to the truck lanes they put in because they cant pull the mountian. The 2500 , not only pulled it but could speed up to pass. And to be honest, thats what i wanted, more control. The 1500 could pull what i had, but the 2500 makes it less of a chore. And i also didnt want a diesel. I still remember going off to a state campgeound up by niagra falls, and my neighbor had to travel like 30 minutes to get to a station that diesel. Hunt and find is not for me. Im sure this is not normal, but it soured me on the diesel thing.