TCS OFF or TRAC OFF
WARNING: This page is about a different car, the 2002 Pontiac Grand Prix. However, it is still accessible from the selected car via links, so may be relevant.
The DIC illuminates the TCS OFF (3.8L V6 supercharged engine) or TRAC OFF (3.1 L or 3.8L V6 engine) indicator when the electronic brake control module (EBCM) inhibits the traction control system.
The IPC receives a discrete input from the EBCM requesting illumination.