I have tryed everything else maybye someone here knows the answer i have a 1999 chevy blazer v6 2wd. My blazer has been acting funny in the braking department. The bake pedel will pulsate when driving slow and im not even touching the brake pedel. When im going fast and come to almost a complete stop the brakes do a shifting sort of feel at about 5 to 10 mph at almost a complete stop. Can anyone help me?

 

Classic WSS problem. To check which one is causing the issue, disconnect the WSS connector at the frame near each of the front wheels, then hook a multimeter up to the wires. You will need to have a multimeter that can read mV-AC output. With the front end elevated, spin the wheel associated with the connected WSS. You should get a value of 250-350 mV-AC. If the output is below 250mV-AC, then the WSS is dirty or the air gap is excessive. Clean the WSS and recheck the output. If it still is not high enough, you will have to remove the WSS again and file down the bearing housing where the WSS bolts on. This will tighten up the air gap between the sensor and the toothed reluctor ring that is inside the bearing assembly.

If you get no output, then you likely have a broken wire between the sensor and the connector or you could have a defective sensor.