2000 Chevy Suburban pulsation in breaking

2000 CHEVROLET SUBURBAN
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Brakes problem
2000 Chevy Suburban V8 Four Wheel Drive Automatic

My 2000 1500 Suburban suddenly took on a very heavy pulsation in the rear during breaking. there is also a knocking in rythym with the pulse in the pedal. i am pretty capable of troubleshooting and repair but this is puzzling. The pads are worn and in need of replacement but i do not believe the pads are the extent of the problem. the pedal does a pretty deep dip every revolution as if the rotor was significantly thinner in one area. i do not drive this car as often as other family members so i am not sure how quickly it started.
Feb 26, 2010 at 7:28 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
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