05 Tahoe 4WD 5.3L
Hi, so I'm helping a friend fix his truck. Driving yesterday and rounded a corner, service 4 wheel drive message came on (possibly unrelated but a first for this truck), then it died and wouldn't restart. Towed it home and some of the dash lights seem to be staying on with the key removed (will post pics of the ones staying on once he sends to me), no crank no start, and no communication to the scan tool. I have checked fuses and have power at the DLC but no communication. Does anyone have any suggestions on where to start?
Thank you