Quote Originally Posted by killerbee View Post
Correct Ross. And this was true beginning in 2011 LML E86, where the BCM needed to be detected. It got worse for 2016 ECM's. So far, have been unable to factory program any USED 2016 ecm using GM. Have had reports from mechanics running into the same problem. And tragically there is presently no supply chain for NEW ...677 ECMs. It must be NEW, and it must be on-board, or on a harness with a TCM and BCM, as best I have concluded so far. A big curve ball and wondering if anyone has found a workaround to be able to use salvage 2016 ECM's.
Has anyone made any headway with this?