Lots of the same feedback. 2011 6.0/3.73 in SUV form. Only tow about 6500 pounds loaded. Lots of power for accelerating or holing speed on hills. 13-14mpg mixed, 18mpg highway unloaded, 8mpg typical towing at 70mph, 10mpg at 60mph.
I've love the 4.10. GM never offered it in Suburban with 6-spd and it's rare in the pickups. As noted, 2011 6.5' bed trucks get 36 gallon tank, which I highly recommend. Ours has 39gal which makes for some 600 mile range non towing and 300 miles towing. Far better than 150-180 miles I had in my prior TV.