Am I crazy...

I parked my 2020 TRD Pro in the garage after work. 4+ hours later I hear a buzzing, similar to a small fan, pump or timer of some sort going off. I traced the sound to just to what I think is a small black box (6" x 8") bolted to the frame above the spare tire.

Any idea what this is? Thanks in advance.

 

its part of the EVAP system, they all do it and its completely normal, freaked me out the first time i heard it too

 

Thanks for this I'll look into it...seems odd to be running 4 hours later.

 

It's normal

 

Soooo that big thick book that came with the truck is important??? Thank you all and thank you @whippersnapper02

 

Ya, you got the pro version of that book, yours should be better than every one else’s.

 

Lol, the limited manual came with some Ferrero Rocher candies and desert wine...

...not that I know, owning a Limited Nightshade. We roll hard!