Question about 2002 Chevrolet Trailblazer Ext

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Had new brakes installed several months ago and now I have a pulsating sensation and rubbing noise when I step on the brakes. It does not happen constantly. I am unable to take it back to the place I had them installed as I have since moved 700 miles away!

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  • smokentote Dec 10, 2009

    I have never had this noise or pulsing sensation even before I had the brakes installed. Is this something that will go away or will this do damage to my vehicle in any way? It is very different from anything I've experienced with my brakes, ever.

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This noise sound normal, as does the pulsing.

Posted on Dec 10, 2009

  • dockterok Dec 10, 2009

    I guess it'd a question of HOW much is it pulsating, and HOW loud is the noise. When you apply the brakes in any car, the spinning wheel (rotor) is slowed by pushing on both side of this rotor with two brake pads. There a few different substances that these pads are made of. I'd guess these new ones are of a different material than the ones you had on before. These differents materials make differnet noises as they stop the car. You pay more for the quiet ones. The pulsing could also be from the new pads as then wear into the groves of the rotor. If you have ABS brakes, maybe the ABS is trying to stop the car even though you are not slipping. In that case you need that looked at, and it probably is not something that was done with the brake change, but then again you never know.

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