Today was the first time I noticed it, and it sounds like it should be there. Was letting someone else move my truck for me, and when you shut it off sounds like a pump is still running for a couple seconds after the truck shuts off. I was standing behind the truck and heard it. Is this normal?

 

i bet it is the turbo spooling down. normal

 

What Matt said.

 

Figured it was something that was supposed to be there. Im just always in the truck and never heard it.