GMC Troubleshooting Questions? Ask a Mechanic for Answers
Hi Kevin, My name is***** this quits is it instant like you turned off the key switch or like it is starving for fuel?
Check for fuel leaks most commonly at the fuel filter housing near the water in fuel sensor as they are known to crack and leak causing a loss of fuel pressure. Let me know
Is it throwing a check engine light? also pressurize the fuel tank with air to see if it might reveal some leaks as it could be opening up a crack when the engine warms since it is 20 minutes into running.
Hi Kevin, Did you get this resolved?
Thanks for the update. Would you like to close this out?
Let me know. Thanks for the update.
If fuel pressure is good and no leaks, module is new and no codes, I would check for engine speed signal from the crank sensor which a loss of speed signal will disable injection. Check for that and let me know.
Hi Did you get this resolved?
Thanks for the update. That is never fun trying to retrace someone elses steps. Let me know if I can be further help once you get back into it.