TRAC Off Indicator

WARNING: This page is about a different car, the 2002 Chevrolet Monte Carlo, 2002 Chevrolet Impala, 2001 Chevrolet Monte Carlo, and 2001 Chevrolet Impala. However, it is still accessible from the selected car via links, so may be relevant.

Instrument Panel Cluster (IPC) illuminates TRAC OFF indicator when following occurs:

IPC receives a class 2 message from EBCM requesting illumination when Electronic brake control module (EBCM) inhibits traction control system due to a malfunction in traction control system.
IPC receives a class 2 message from EBCM requesting illumination when Body control module (BCM) detects that traction control switch has been pressed (signal circuit is low). BCM sends a class 2 message to EBCM in order to disable traction control. BCM sends a class 2 message to radio in order to activate an audible warning.
If brakes begin to overheat, traction control system will turn off and TRAC OFF indicator will illuminate until brake cool down.