I have a 2000 Chevy Silverado 1500 Z71 with a serious squealing coming from the right rear end when going in reverse. I thought it was the brake pads getting low on me. Replaced the pads and parking brake pads, all is good there, I even replaced the rusted dust plate as well. Soon as I put it on the ground and started to back out of the drive, the same noise was there. I guess it wasn't the brakes. Any ideas? It's a pulsing squeak, squeak, squeak and increases in frequency as the speed increases. It's not a grinding or crunchy sound and It won't do it when I spin the wheels while the truck in in the air.

Wheel bearing, Pinion bearing?

Any help thoughts would be appreciated.

Thanks,
Pat

 

I had the same promblem and went through the same steps as you and it turned out to be a bad universal joint

 

This !!!!+1