Cam sensor maybe? And I think gm had a service bulletin about the filling process, but I could be wrong
Sent from my SM-N930P using Tapatalk
Edit: its going to be 1 or two things- the evap caninster, or the screen in the filler neck. The screen in the filler neck may be cockeyed if anyone has tried to steal fuel from it.
Edit edit:
Update guys. No engine light since Replacing my CANISTER PURGE SOLENOID VALVE. Cost me about $35 @ the dealer.... Also tonight was my first fill up since replacing the valve. I literally filled me truck up with 18 Gallons of gas in like 5 minutes. Problem fixed!!!!!!!! I appreciate the insight guys. Thanx to Anthony and all that replied......