hi guys, got my truck back for 2 days now from a different dealership.they updated 2 new flashes. one for the particulate filter, the other for the transmission. didn't need one for the tranny but he did it just because. feels a whole lot better now. haven't towed with it yet. but i will in 2 weeks. Then I'll really know for sure. but in not so manny words I got the service manager to admitt that the new flashes that they're doing, to SLOW down the buld up of soot in the particulate filter. they're messing with your engines fuel air mixture and all the computer programing . so the unlikely hood of a SLIGHT power loss or what I call DE-TUNING is not totally out of the question. any way I'm happy I got my truck back. but still salty of this whole situation.