strange noise

96 jimmy making humming noise from right front tire. checked brakes, rotor, driveaxle. dont notice it when going slow, also does it in 2 or 4wd. any ideas? thanks.

Is the wheel bearing GOOD?

Take the truck out on a curved road, preferably one that has both right and left curves, and see if the noise goes away when turning at medium to higher speeds, if the noise goes away in the curve and then returns when you straighten out, your wheel bearings are shot.