Stock 2006 LBZ 190K. From a dead start , standard acceleration, 1st and 2nd gear feel typical, shifts into 3rd and if or when the RPMs hit about 2K get noticeable power surge. Coming up on a fuel filter replacement so swapped in a fresh one. Still doing the same. I have owned this truck from brand new and it feels different. nothing else appears wrong. I have been driving my 3500 van that is a gasser most of the time as I work out of that truck so maybe it is me. Any thoughts ? Thanks in advance.