It seems no GM cars are listed on Sigenergy compatibility list of manufacturers. The list includes most other EV manufacturers. Does anyone know the problem? The charger Sigenergy model #11080012 https://www.solarelectricsupply.com/sigenergy-dc-ev-charger-25kw is very capable and seems to be matched electrically very well (DC-DC). Is this a communication/software handshake problem? Can we assume a fix is in the works?