When coming to a stop the truck stalls.Upon restarting,idles fine but when put in gear stalls out again.Must neutral drop to run then fine.Been to dealer 4 times for problem and nothing.No codes or lights.Can happen once a week or two weeks or whenever it feels like it.Any ideas?

 

Sounds like an IAC problem to me, trouble is when you take it to the dealer you know it won't do it. So next time see if you can tap on it to see if your truck runs while someone else drops it in gear. It is on top of your engine bolted to the throttle body, with two wires(I think) going to it, and two bolts holding it down. Sometimes problems like this are hard to pin down. Good luck