OK ALL!!! i meant to post this a few days back but we are fresh bakc from our 1600 mile round trip to Jennings GP in Florida with my Suburban and 6x10 Enclosed trailer.. after some driving around town with our the trailer i noted a 2-3mpg gain in daily driving after brians tune.. thi is substantial as my foot most likely got a bit heavier with the added power HAHA! so on the trip.. for 71-75-675 into valdosta GA! even thru all of the crazy hill the truck and trailer noted a gain of 3-4 mpg with the trailer. i averaged 65-68mph the whole trip(instead of my normal 70-75 sans the trailer) this result was way more than i expected.. all in all im an more than satisfied. this tune will not take me much longer to pay for itself in gas savings! thanks again brian, when i get my Tundra its coming straight to you