Circuit Description
WARNING: This page is about a different car, the 2002 Oldsmobile Bravada, 2002 GMC Envoy XL, 2002 GMC Envoy, and 2002 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
The ignition 1 voltage circuit supplies 12 volts to the traction control switch. The EBCM illuminates the low traction indicator by applying ground to the traction control active signal circuit.