Vibration issue with video please help with diagnosis

Sometimes when I roll the back window down just a bit , you get that suction sound from the air passing by the rear window . The sound in the video clip is much worse . I swear , the OP has a compressor under his hood hehehehe

 

Sound like my wife’s toy setting is suck on the “you’ll never walk again” mode

 

Wish that was the case lol

 

My gas cap is nice and tight

 

At 40,000 miles , you should still have warranty . Maybe the truck thinks your gas cap is loose?
Maybe a vacuum line is disconnected or possibly an exhaust gas recirculation hose ?
Have you made an appointment with the dealership yet ?
I believe your vacuum pump runs with the serpentine belt .
For diagnostic purposes , you can remove the serpentine belt and run your truck up to the speed where you heard the noise .
If your issue is the vacuum pump , you wont hear the noise with the serpentine belt removed . No more than 4 minutes run time . When the serpentine belt is removed , youve got no cooling or battery charging
Have you popped the hood to look at the vacuum pump ?
In order for Tacoma World to help you , you have to answer the questions we ask .

 

Thank you. Schedule for an appointment next week. Funny thing is going 70 mile up the mountain with no issue, but coming down the mountain have this issue in multiple occasion.

 

Makes sense
When your foot is off the gas pedal and you are coasting downhill during deceleration , upper manifold vacuum is very high .

 

was your radio on? sounds like white noise with interference from the engine/alternator broadcasting through the speakers