Ok guys this is my first post here.
I have a 2008 gmc 2500hd ccsb 4x4.
When i start the truck after its been sitting it starts and runs great, but ones i drive it and it makes operating temp its takes a turn for the worst. While im driving it will start jerking and kinda cutting out, it hasn't ever died but its rough. When i come to a stop light i have to hole the brake tight or its gonna jump across the intersection. But one i park it and it cools off, and i start it back up it runs great till it gets hot again. It dont smoke or anything, i have put a new fpr on it. Was told that it has a new cp3 on it but i can not confirm that. Also put a new MAF on it. It is turned and deleted, "unsure what the tunes are but told it is efi". Fass lift pump on it, beans sump, 5in straight pipe. Also deleted the fuel filter housing.

Anything will help guys.

Thank you,
Micheal