Circuit/System Description
WARNING: This page is about a different car, the 2008 GMC Yukon and 2008 Chevrolet Tahoe. However, it is still accessible from the selected car via links, so may be relevant.
The EBCM monitors the number of Key On and Key Off cycles. When it detects that a Key Off cycle was incomplete or non-existent this fault will set. This means the fault reports a problem that occurred at the end of the previous ignition cycle. If this occurs during an EBCM service operation, any calibrations or offsets learned during that service operation may not be properly stored in memory.