Considering 2012-2015 Suburban, have a few questions

The 2013 burb with the 6.0 and low mileage is the one that u should be looking at..... the 8.1 is an awesome engine, but........ drinks more the the 6.0 and is much older. With the 6.0 and 6 speed auto, ur hwy mpgs should be 17-18 or so... I get 17 mpg at 70 while driving my 2009 2500hd with the 6.0. That’s my take... get the low miles with the 6.0, even pulling a small camper your still fine...