Circuit Description
WARNING: This page is about a different car, the 2003 Oldsmobile Bravada, 2003 GMC Envoy XL, 2003 GMC Envoy, and 2003 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
The LED dimming supply circuit supplies voltage to the traction control switch. The EBCM turns OFF the traction off indicator by applying ground to the service traction control signal circuit, which causes the inverting driver module to open the traction control system passive indicator control circuit.