Engine died while driving

[tstout4163]

2000 GMC C2500.
Hey guys, looking for advice
This afternoon while I was driving home from work, and when I turned on my turn signal it was blinking really fast like they had gone out, then quickly returned no normal, shortly after at a stop sign, It did the same thing, turn signal binking like it had went out, then the engine died, it took a few tries to get it started again but once I did it died soon after. I managed to get to a parking lot to see if I could figure out what was wrong but I couldn't find anything. So I tried to start it up again and it's been running like normal ever since.
Any advice?

 

[Schurkey]

Verify battery voltage. Verify charging voltage.

Look at the turn signals/4-way flashers at all four corners of the vehicle. Assure no popped bulbs.

IF all that is good, we can move on to engine diagnostics.