Circuit/System Verification

WARNING: This page is about a different car, the 2008 Cadillac STS. However, it is still accessible from the selected car via links, so may be relevant.

Ignition ON, observe the DTC information with a scan tool. DTC C056D should not set.

If DTC C056D 35 failed this ignition, replace the EBCM.

If DTC C056D 34 failed this ignition, program the EBCM.