Mine did the same thing. Take out the sensor and clean it up. I added dialectic grease though do not know if necessary. You should also check to make sure your bearings are ok. Mine acted up when the bearings went bad. HTH
If a 2001 Chevy Impala will not start after replacing a thermostat, perhaps it is possible that a sensor was bumped unknowingly. Check all of the sensors that might have been touched during the changing of the thermostat to see that they are all still plugged in.
Service brakes - replace Master cylinder Parking brake- either lubricate or replace cables ; I had a similar problem with my 1999 Chevy blazer, i ended up replacing the caliper and have had no problems since.
You should jack it up where you can take both wheels off and start taking one side of your brakes off and replacing them. If you have problems look at the other side.
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Antilock Braking System sensors are mounted at each wheel to directly monitor the rotation. Look for the wires going to each wheel near the brakes.
Yes, it has many sensors.
What sensors? Be specific.
Disc brakes
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When this happened on our 2001 Malibu it was the sensors at the wheels that were faulty and not the brakes. Somehow they had been incorrectly installed after a previous brake check.