Originally Posted by fast75vega
got the diablosport in the 6.6 duramax in the 4x4 3500 dually crew cab and it works great... in tow mode .... it will pull a frigging house down and with the 125hp program in it... she will just pin ya in your seat
get 20 to 21mpg in reg mode
and 45 to 50 in 125hp mode.. pending on speed. over 70mph it drops of alot
45 to 50 mpg??? :shock: I want one of those!
My 05 duramax with 207,000 miles still gets 20 on the interstate.
And you are right much over 70 makes a big difference.