Circuit/System Testing

WARNING: This page is about a different car, the 2007 GMC Sierra and 2007 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.

IMPORTANT: Fix any Brake System related DTCs before using this diagnostic.

IMPORTANT: This DTC may be stored as a history DTC without affecting the operation of the BCM. Do not replace the BCM if this DTC is stored only as a history DTC and is not retrieved as a current DTC.

Using a scan tool, is DTC P0703 current in the ECM?

If DTC P0703 is current in the ECM, replace the BCM.
If DTC P0703 is not current in the ECM, the system is OK.