i just bought a 2001 grand prix gt with a 134,000 miles on it and ive been noticing that there something wrong with the traction control. i notice when i turn the key on that the low trac light works on the dash and stuff but none of the lights turn on when the tires break loose saying that i have low traction. and when i push the trac button it does turn the trac on or off. at least none of the lights ever turn on so how do i know if the hole system is bad or if just the trac button switch is bad?