A bytton in my car an when i push it the letters trac on

The button is for a feature call low traction , when the low trac light is on ( on the dashboard ) the traction control system is off. when you press the button again the light should go off ( low trac. on) I leave mine on all the time. it works with the antilock brake system. if the computer detects that the wheels are starting to slip or slide , it cycles abs on and off quickly to help you remain in control of car, feature is more designed for driving on icey roads. Just leave low trac. on and dont worry about it ( no trac, light on dash) hope this helps S.R. Peace

Just leave it on, especially if you have supercharged motor, it will prevent your wheels from spinning that much and save your front tires and tranny