Circuit/System Verification
WARNING: This page is about a different car, the 2006 Chevrolet Monte Carlo and 2006 Chevrolet Impala. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT:
The engine may crank during this procedure.
Using a scan tool monitor the Ignition Run/Crank parameter while turning the ignition switch. Compare the parameter state with the typical scan tool data above.
- If the Ignition Run/Crank parameter is in normal range for all ignition switch positions and the DTC is current, replace the BCM.