I have a 2007 pontiac grand prix gxp. When I apply the brakes it makes a horrible high pitch squeal. I replaced the pads rotors and put anti squeal on the rotors as well.

I have a 2007 pontiac grand prix gxp. When I apply the brakes it makes a horrible high pitch squeal. I replaced the pads rotors and put anti squeal on the rotors as well.

I have tried many different brands and qualities with no luck. The car has done this since new and even the dealer said that there wasn't anything they could do about it. please help

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