My dryer makes these brutal high pitch squeaking sounds. I replaced the front drum bearing and glides (all 4). It is still making this noise. Any suggestions?

There are other bearings. I would look at the other ones and make sure to clean it out well. Check out this manual: https://dl.dropbox.com/u/8010163/GE_Dryer.pdf
It could be the idler pulley, too.