Has anyone came up with a resolution to this yet? My intermittent issue is now a permanent one. Cannot charge at all.
I believe GM calls it the "Battery Energy Control Module assembly" to be clear, the relays are fine, there are three 10 amp relays which control the heater, the APU and the Charger. The Pin that goes to the front plate has the issue. I bought the whole assembly from eBay for less than 100 bucks shipped. I put some dielectric in the connector to hopefully help it keep from arcing. But unfortunately you do have to remove the battery. That's why the Huge date range of my postsDrFumanchu- first of all, thank you so much for taking the time to reply to this with your results and conclusion. Also, double thanks for posting the image of the affected PCBA and the failed solder joint on pin R6. This is an excellent counter-hypothesis to what could be wrong with my MY2012 (though I initially suspected the contactor/relay itself was to blame)
Could you please provide more information on which module that is, and where it's located? I believe it is part of the BDU, and that it can only be accessed by dropping the battery, removing the top battery cover, draining the coolant, and disconnecting the BDU from the front of the battery...but I really hope you might say something different.