noise coming from underneath running board
 

I bought a 2019 F-150 Lariat 4X two weeks ago. Discovered a noise that is coming from behind and underneath the running board/driver's side. This noise only occurs when I open the driver's door and the truck has been parked/not running for 20 - 30 minutes. If I go and open the driver's door under that time frame, there is no noise generated from that located. When the noise occurs, it only last 1-2 seconds and sounds like a rapid fire pellet pistol. Note: there is also a less sounding noise that comes from underneath the hood when I open the driver's door too. I plan on taking it to the dealership next week but would like to hear from someone who has experienced the same symptoms from their 2019 Lariat.
Thank you!

Mine does the same thing. It is the fuel pump priming and normal.

thank you for your response
 

I appreciate your speedy response to my question! Compared to my 1998 150 XLT, which I am going to keep in addition to my new Lariat, I can not keep up with these techno gadgets to the vehicles of today!
Thank you again!