OK, after reading for hours on here through the search tab most of the problems are at idle.. my truck runs and idles fine till you get to 45 then it starts surging, if you press on the throttle it starts to shake till you get to 60 then goes away. The dealer said it was the fuel filter so they change it. well today it was worse then ever I turned around and took it back to them as soon as they opened. I just bought this truck last week and they told me they would take care of the problem. I know they didn't make much money off of it and they aren't going to want to spend much money on it. If I can get a idea of what it is I'm sure i can do the labor part. It almost seems like it's going to slow to be in overdirve...like it's wanting to chuge along. kinda like being in 3rd gear when you needed to down shift and didn't. any help would be great.