My 08 Tahoe will ‘die’ at odd times. Sometimes I open the door and there is no charge from the battery. This can happen between opening the door with the remote and trying to start the car. It can happen between putting the car in park and cutting it off. I have come home, dut the car off and been unable to open the doors until I remember how to do it manually. a jump will always restore the car - for a while. If I leave it alone for an hour or so,it usually will start but the clock and climate control have reset. Most recently, the alarm went off, I turned it off using my remote. I found later that the car had ‘died’ momentarily. I have had the car checked and rechecked. Everything seems to check out each time - battery, alternator, whatever. This stated a 18 months ago when my battery died and I got a new one. Most recently, my mechanic has changed the make of the battery and checked every connection and every component. I am now waiting to see if this happens again. Usually it happens every 4 months ±. I am at my wits end. I do not know what to do, My mechanic does not know. He has even tried to update the computers n the car.