NBSFan

If I remember correctly this was a GMT800 Ext Cab issue with the flip out rear windows. Awhile back I read something about replacing the window latch for the fix. It took maybe 15-20 mins to remove the old and replace it with a new 1. There was a youtube how to video on it too.

If the reset don't do the trick it's not too complicated to remove the old and replace with a new actuator. I had the same issue in my 99 Silverado and replaced both actuators under my dash for the fix. Decided to replace both lower actuators, fan blower and cabin filters because after I got in there things looked old and never touched plus my fan blower was noisey.

It's my understanding that fuel pressure needs to be at 50-55psi for the truck to run correctly. As I mentioned , it will run with less pressure but not 100% which I think explains your random issue. You can also check your fuel pressure regulator by removing the vac line. If fuel leaks out you found your pressure issue.

Random Stalls & No Starts = check your fuel pressure

Random stalling..... My bet would be low fuel pressure due to a failing fuel pump. Reason being is you mentioned it stalled shut down on the previous owner and stalled after you fueled it up and that was 1 of the issues I had 2-3 weeks ago with my truck. If you check the fuel pressure on the fuel rail port it should be 50-55psi. Some pumps will still work 40psi-higher but you will notice things like stalling, poor acceleration, or if going up hills the engine might miss as though it's running out of gas. Sometimes you can extend the life with a fuel filter change but in most cases it's time tilt / remove the bed or drop the tank to R/R a new fuel pump with harness connector. Be sure to have your fuel tank checked for crudd in the bottom while the pump is out. I replaced mines with a Genuine AC Delco Fuel Pump & Filter.