What does the abs light mean on a cadlaite cts?

The ABS light on a Cadillac CTS indicates a problem with the Anti-lock Braking System. This could be due to issues such as a faulty wheel speed sensor, low brake fluid, or a malfunction within the ABS module itself. When the ABS light is illuminated, the system may not function properly, potentially affecting braking performance. It's advisable to have the vehicle checked by a professional to diagnose and address the underlying issue.