Whistling noise

[Maurice67L]

Got a 14’ Cummins. Noticed today a whistling noise coming from the front windshield area??? Or front of truck. Did the tap method around most of the windshield and still getting it. Costing down hill can hear it louder. Any help would be great. Driving me nuts right now

 

[04fxdwgi]

Coasting down hill creates higher vacuum on intake. Getting louder while coasting down hill may equal a vacuum leak

 

[markabby]

Is the cowl in good shape and not warped by the sun? Make sure its not lifted away from the window.

Could it be the side mirror? Maybe try painters tape in certain areas of the mirror?

Windshield seals in good shape? I see you tried painters tape there too.

Door seals ok? Try taping them on the outside and see what happens. but, you have to drive with blue painters tape on the seams....lol

I had a 2011 Ram that did the same thing at certain speeds, never figured out why.

And post back if you solved the problem!!!