SYSTEM SAYS "SERVICE STABILITY SYSTEM" on 2003 Cadillac Seville SLS

3 LIGHTS:ABS/BRAKE/TRACTION CONTROL AND SERVICE STABILITY SYSTEM HAS COME ON 2 DIFFERENT TIMES, WHEN I START IT AGAIN LIGHT GOES OFF. THIS TIME IT IS STAYING ON. WHY AND WHAT DOES THIS MEAN?

1 answer
have codes scanned and seek diag and est.