GMC Troubleshooting Questions? Ask a Mechanic for Answers
Hi and thank you for the question. When the engine "shut down" did it run rough before it stalled or just shut down? When you try to turn it over, do you hear a click, or no?
I am sorry for your trouble, I'd be more than willing to help.
...when you try to turn it over, are all the dash lights on, as in all power normally? Or are the dash lights off as in a dead battery?
Ok, I know its getting late. I will wait for you reply. Please understand, I'll return a response when I hear back from you. It may not be until tomorrow night, but know I'll respond. Thank you for choosing JA.
Are you able to see if there are any diagnostic codes stored?
Any other symptoms at all? Any other items not working, door locks, chime etc...?
Unfortunately, this may be something to bring to a dealer for diagnosis. That code is for high speed LAN communication, One of the modules, most likely the ECM has lost some important communication rendering the engine to stall. It would be extremely difficult if not impossible to diag via online without having the vehicle resent.
I am sorry you are having this type of difficulty. I really wish there was more I could do. Please let me know if I can help at all in the future.