Humming noise from rear after shut off

[Dnpbakon]

So I tried to search and couldn’t really find anything similar to what I experienced. I came back from a Quick grocery trip run and had the truck in sport mode and was driving pretty spiritedly (but safe ofcourse) . Upon parking in my garage and shutting the truck off, I noticed a humming sound coming from the bed. anyone experienced this? it lasted for a few minutes and then shut off.

I figure it was the fuel pump depressurization but not sure. Any input is appreciated.

Also, love ceramic coat. Paint looks “wet” all the time lol.

 

[Swacer_2]

I noticed a simliar thing as well a couple of times. I don't think the spirited driving had anything to do with it. Being that its coming from the back, I agree its a fuel pump thing most likely. It make that sound for probably 2 minutes or so and then disappeared. Shrug

 

[Rodney Bustamante]

Did you ever find out what this was? While I drive and when I shut it off, my truck makes a loud buzzing sound for about 10-20 seconds and stops. It's been getting louder. Just 11K miles on it.