You may have recourse since the dealer refused to fix the problem under warranty. Get all your documentation together of your trips without recourse, and lodge a complaint. They should pay for the repairs you had done.Do you have a programmer in your truck? I've heard of the fuel pressure sensor at the rail blowing out if your programmer is set to high. Programmer puts more fuel pressure in the rail blowing the sensor out. Common problems with blown rail sensor are extra smoke, hard starting and higher egts. If it is blown it's cheaper to buy the whole rail instead of just the sensor. Last time I checked they were going for around $400.00 or so.
I doubt it's your lift pump. I just replaced the lift pump in my 06 and the only problem I had was lack of power when I put the pedal to the floor. I still had power but not as much as I used to have. Checking the fuel pressure I had 1 psi of pressure and it still ran fine.
My advise is don't take it to the dealer. My truck is still under warranty and I tried to
get them to replace said lift pump. They told me nothing was wrong and that they test the fuel system by a flow test. If it's flowing fuel then to them it's fine. I guess it's their way of getting out of fixing things. After a week of them having my truck, me telling them what the problem was over and over, I still had a truck with a bad pump. Put a new pump in it and had my power back.
At any rate, call scorce and talk to bill or rip. Both great guys to deal with.