2001 impala you hear a eeerrrhhhmm sound as your brake pedal forces itself upwards for about 2 seconds that's when the message system displays service your traction then disables it?

the traction light comes on telling you there is a low traction condition, not that the system needs service. the anti-lock brake system is the noise you hear. it is a series of hydraulic pumps that is cycling the brake pressure on the locking wheel. that is also what you feel on the pedal. the system is working as it should.