i have a 2006 chevy trailblazer ls.i have the traction control light on.i've tooken it to the chevy dealer to take off and fix.they gave it back to me cleared and after driving it .it came back on.what xcan be the common problems to make it reappearing

 

It could be a wheel speed sensor or even a bad wheel hub assembly. if the ecu gets a bad signalfrom one of the sensors, it triggers the traction control to disable it.