I have a Clipper Creek 40 amp charger that will trip the GFI for my bathroom floor heater when both are in operation but not when only one is active. I've had 2 electricians look at the wiring in the service panel and both agree there are no problems there. I've added a rubber/plastic floor under the Bolt to add insulation with no change in results. The GFI circuit was swapped with another GFI circuit with no change in results. Lastly I had a Tesla S owner bring his car over to see if the car made a difference. Viola, the GFI did not trip and the Tesla pulled the full 40 amps through the charger. When the Bolt is charging my car, it only pulls between the 28 and 32 amps. It appears that the Bolt is sending some "noise" back through the charger. Is it a charger problem or a Bolt problem? Who do I contact at Chevy?