Roaring/howing noise at 40mph from front end

[z71_tahoe]

Hey guys. I am fairly new to the z71 tahoe(2004 138K) that I have, but it has always had a roar or howl at about 40mph from the front end. It sounds almost like a truck with big nobby tires going down the road just not nearly that loud. It is really only noticable at 35-45mph and loudest at 40mph. It goes away with speed.

Is this normal? Should I be worried?

 

[AZSCTACO]

Check your front tires for cupping. This will occur if you don't rotate your tires very often or your shocks/struts are shot.

 

[crazyikon86]

tire noise. check tires. rotate front to rear. check alignment.