Hello, looking into a 2011 2500 suburban. Was looking for anyone
With some real time mpg's.

 

12/13 in town, lot of short trips. Best on hwy was ~21+ w/ 18/19 being more typical at 75 mph.

 

I have a '10 2500 burban (love it) I average right around 15-16 mpg with no towing. Just finshed 3K miles towing 9K lbs + 6 people and burban full of gear (run at about 75-77mph) and averaged 10 mpg ... hope that helps.