Humming Growling sound- wheel bearing?

Buy the highest quality bearing/hub you can.

 

I've been meaning to post an update. I got the bearing/hub combos y'all recommended from Yota Bearings and Hubs, and switched them out over the course of a few days. It took a while because I had some trouble with rain, crappy driveway, pulling the old ones off, etc. But I did it! They totally solved the problem and I'm super stoked! I've always been good with mechanical stuff, but never was a car guy and have felt a little intimidated doing something that... significant... to my truck. But I watched several how-to videos and it turned out great. Next time (if there is one) I'm definitely getting a gear puller though. :-D

Thank you for all your advice and help!