Hi guys we have a 04 Chevy C4500 diesel and it died on the road and had to be towed back to our shop it’s 3 days where we’ve tried 4 different scanners and it’s coming up no codes but it won’t start can someone help me I’ve changed the filter primed it check fuel from the bleeder near the alternator and there’s fuel when we prime it but we crank it it doesn’t have fuel coming from the same bleeder. Am I missing something could it be the injector module?