GMC Troubleshooting Questions? Ask a Mechanic for Answers
Hello, my name is***** you for the question. Can you tell me if the fuel system seems to stay primed even after the truck starts for a few seconds?
You either have a failure in the relief valve in the fuel rail which is keeping the system from building enough pressure to fire through the injectors or there may be another issue. Do you have a scan tool that reads engine data and fuel pressure?
It is possible. If it was then the security light would be illuminated while the engine is cranking.
That is normal. Please let me know what you find and we can continue if needed.
You should be able to build over 2000 psi while cranking. Let me know what you find and we can continue if needed.