Stalling or Chugging
 

In the last week or so my truck has stalled 3 times. All when I was driving on the highway and then either got off and came to a stop or when coasting/idling on the highway in a traffic jam. The idle will fluctuate up and down a bit, then stall. It only seems to be after driving on the highway though.

Any thoughts??? I will change the fuel fliter just in case but I don't think this will be the problem.

:smokin: :saw:

Wow man.....that sounds dangerous!!!
I would make a serious effort to get to the bottom of it pronto.

Could be a ground that is losing contact. :dunno:

EGR....maybe PCV

Does the check engine light ever come on?

You might want to pull the codes on that 3.4L of yours even if there is no CEL.
There may be some temporary ones stored in there when the stalling happened.

Check..
 

Check the MAF sensor. Sometimes it will cause surges sometimes and rough idle then just dying out like you are talking about.