2003 Buick Rendezvous ABS Traction Light On

Your mechanic will start by reading the stored diagnostic fault code(s). That will indicate the circuit or system that needs further diagnosis.

The first thing you need to do is have the abs/traction computer scanned for codes and let me know the exact code numbers not code descriptions? The diyer scan tools like the auto parts stores do free code scans with won't read those codes on that vechile.It will take a professional scan tool.