After either coasting down a hill for an extended period, driving on the flats for a while an not calling for too much fuel or extended idle (10 min) truck will dead pedal. Let out and roll back in it an she's good to go. Fuel pressure is good, filter are good. APPS or VP? Have not canned for codes.

 

pull codes and that will tell you.

when mine got dead pedal because of a bad APPS, it threw a CEL and an APPS code every single time it got dead pedal.