Joe1264

The problem is in the Torque Convertor. Had all the same issues on a new 2017. Two dealers told me this was normal. I knew better as I come from an automotive background in the repair industry. Found another dealer and he told me issues with failures on the 6 and 8 speeds. On mine the Torque convertor was eating itself and the pump on the transmission had failed. GM refused to replace the whole transmission and instead changed the Torque Convertor, Pump with Bell Housing assy and flushed everything. Again problem started at 2000 miles.