More than you ever wanted to know about about OBDII codes: https://www.troublecodes.net/bcodes/
As for the EBCM, I would start by carefully checking/cleaning all of the wiring connectors/connections from/to the EBCM. Coat the cleaned connections with dielectric grease to help prevent future problems.
2008 2500HD LT CCLB/Ally. Line-X, B&W Companion, MaxLoader Springs, Edge Insight CTS, Kennedy Custom ECM
2009 Arctic Fox 5er, Silver Fox Edition 29-5T, 3.6 Onan LPG, SteadyFast Stabilizers