Whistle coming from engine bay @ 2500 RPM???

Let me preface, I’m not very nit picky about my truck or cars in general, I’ve read a lot of threads already where people say “ignore it..enjoy the truck” “turn up your volume knob..” yada yada yada. But I have noticed a particular sound recently coming from my engine bay literally at 2500 RPM upon acceleration. The engine has a distinctive whistle as I accelerate exactly at 2500 RPM driving approximately 50-60 MPH. Has anyone else law had this issue?? My truck is a 2019 Toyota Tacoma TRD OR 4x4. I will be letting the dealer know on my next service visit but I wanted some peace of mind for the time being. Lmk if there’s others with the same experience!

 

Any changes or opening of the Air Filter box or tube?

 

That’s my bad I should’ve put that in my original post, no it’s bone stock, zero changes whatsoever to the internals.

 

Any friend own a harmonica?

 

It’s the ac . It’s more like a harmonic sound. Mine had it since new. Still makes it occasionally now . Didn’t had it fixed. My ac blows ice cold air even on 100+F in the parking lot or trails.

 

It's the turbo
/s

Honestly dude if it is nothing obvious I would reach in there and jiggle stuff around to see if anything is loose. If nothing is loose the air might be flowing perfectly between some wires or along a certain surface and it's causing the whistling noise. Could possibly be a belt that whines at a certain speed thanks to its harmonics.

Could be a lot of things

 

How come when people have these types of “sound” problems or weird noises ...


No one ever posts a video.

 

I believe this site lets you post only certain types of videos . So it’s kinda of a pain in the ass .

 

Trying very hard not to bring back Bub Rub and Lil Sis

 

Chances are, if you were my friend anyway, you should look for a kazoo mounted near the fan.