2000 cavalier ecu - trac off

My "trac off" light came on & I am wondering where the ecu reset button is and the protocol that this step requires, (if the battery is to be disconnected, how long?, etc.) The car has been driven lightly & has 28,000 miles on it.

Thanks,

Looped

Usually it comes on and off if one of the sensors are bad. Try disconnecting the battery for a few hours and then see if it comes back on?