Hi Customer. Thank you for asking your question on JustAnswer. The other Experts and I are working on your answer. By the way, it would help us to know:
-How many miles are on your Chevy?-What type of engine is in your Chevy?i can check for bulletins and look at wire diagram.Thank you again for trusting us with your problem. Please reply as soon as possible so that we can finish answering your question.
there are couple ecm fuses which one blows? do you know, heres wire diagrams for ecm.
thats a good thing ecm b controls fuel pump relay circuit, could be relay internal fault, can switch with another relay in relay center to eliminate relay, next thing is oil pressure switch wiring gets hot by exhaust or rubs through, rots out by sensor, causing wire to ground out blowing fuse , this is most common problem.. i'll help you through this as best i can...