Q: 2002 buick century squealing only in reverse on 2002 Buick Century

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When I put it in reverse I get a very high squelling noise from the front area. I have replaced the front wheel bearing and also checked the brakes and they are fine. Still have the squeal but only in reverse????
(1) Answer
same problem after i replaced ft wheel bearing assy on my lesabre. the metal backing plate that the speed sensor mounts up i had bent in to get to inside bolt was rubbing on rotor usually in reverse but at high speeds,i took apart to check and could see where rubbing on rotor,i bent back no problem since.