Twice my 2014 Sierra SLT has a complete shut off. Key fob doesn't work, no exterior or interior lighting. Almost as if battery is dead (battery just replaced less than a month ago). The only way I can get the truck to start is by disconnecting the negative battery terminal, wait a min, then reconnect. Once the battery is reconnected the truck starts and runs fine, no check engine light or errors. I had been having the steering issues but just did the recall yesterday and the shut off still happened after. Im guessing this is unrelated. Anyone have this experience or thoughts to what could be happening?