Hi, My 2500 has started hesitating when pulling a load or a hill when I ask for more power. If I back off it quits. It did it really badly yesterday morning when I was pulling a trailer but on the way home it was great until I started up a very steep hill. Today it was fine until again I started up the steep hill. I live at the top of a mtn and the road is very steep and about 1.7 miles long. I did put some fuel treatment in it and the fuel filter was changed about 10k ago. Any suggestions? TIA!

any mods to the truck, or completely stock? Codes? fuel pressure?

any mods to the truck, or completely stock? Codes? fuel pressure?

I dont know if there are any mods. I bought the truck used 10,000 miles ago and none of the lights or on and I dont know how to check the fuel pressure.

just because no lights are on (i.e. check engine) doesn't mean there aren't any codes, unfortunately.As for checking fuel pressure, the only method is to either install a fuel pressure gauge, or put a fuel pressure tester gauge onto the schrader valve bolt at the pump.