i have a 2000 impala and the service traction system light has been coming on and the light trac off is?
Like the other answer said it's most likely the wheel speed sensor...the PCM will store the code however if it's not an active code I wouldn't go changing stuff....sometimes it can be the wiring(the wiring in that area SUCKS). If it happens again go to a dealer or a trusted shop, not some idiot behind a parts counter.
the most common reason for a trac light is a abs sensor in one of your hub bearings. some times they will short out or become dirty from brake dust. u should be able to take your car the the nearest auto zone are Commercial parts store and they will usually do a engine diagnostic for you if it shows a abs sensor problem then that will probably solve your problem when replaced
