I have an 03' duramax, check out sig for customizations, and all of the sudden sometimes not all of the times when you take off and hit about 2000 rpms the trucks starts dying and sputtering. let off and roll on the peddel gentland keep it under 2000 rpms and your fine the after awhile it will be fine and you can romp on it all you want. It's been happening for a little over a month or two and I have changed the fuel filter twice in the last month and it work great then dies later. Any help would be nice thank you. I did receive some parts yesturday that I ordered to install a secondary fuel filternext to the tank. I'm putting on a 2 micron fuel filter to hopefully help out my problems hopefully this week end.:(