BRAKE SURGING

Chevrolet Blazer

Tiny

aw_f4i

May, 3, 2007 AT 6:26 PM

I have a 2004 chevy blazer zr2 with 4 wheel disc brakes, abs, the 4.3l engine, and 45000 miles. Last week I changed out the rear pads and had the rear rotors turned. The front are still original. After this work my blazer now surges when I moderately brake at slower speeds (20mph & under), (feels like they are grabbing and slipping) until I come to a stop. The problem is not as noticable when I brake harder at slower speeds ( 20mph & under) but very noticeable when braking hard at higher speeds (50 mph & up). Would the problem be a bad machining job on the rear rotors, are the fronts warped and now more noticeable with the rears ok, or is there something special about bleeding the brakes with abs? Any help would be greatley appreciated.
Thank You.

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Tiny

M_H_RITZEL

May, 3, 2007 AT 10:21 PM

When the vehicle grabs do you feel it more in the back or the front, if the back where you put the new rotors on check and see if any grase got on the rotors and clean with disc brake cleaner

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