My 2000 blazer is humming from right front, I know its not the bearings the noise gets louder when slowing down however if you switch it from 2wd hi to 4wd hi or lo the noise goes away, please help any info appreciated

 

I am having a similar problem. I get a really loud humm when i slow down on highway ramps sometimes but it goes away if i stop the truck and go again.

 

I'd check your cv axles