Originally Posted by BulldogRed
I just got my back from the dealer with what sounds like the same thing. Mine would start lightly chugging on inclines. It did it at all times, towing or not. They did a PCM update (under warranty). That seems to have fixed it, but I haven't been on any long trips since...
I'm glad yours worked out for you, did you have to duplicate it for them or did they just go ahead and flash it for you? Up until now the truck has been awesome, I hope it's an easy remedy like a flash to the PCM, I disconnected the battery last night and let it sit for a couple of hours, then took it for a ride and it was really hard to tell if anything changed.