Well, today was the first day that I actually towed a loaded trailer. I was very impressed with how well it towed, lots of power, smooth and good at stopping the load. The gas mileage is probably 10-11mpg though, not bad. So I should average around 13mpg each tank, which isn't too bad.
After 2 days of owning this truck, I am very pleased. Though I did find out that my tow/haul mode button doesn't work, I'll have to have that fixed (thankfully I got the GM certified warranty with this truck)
'07 Chevy 2500HD
2010 John Deere Z925A 54" MOD
2011 John Deere Quik Trak 647A
John Deere walkbehind