Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
Hi There, I'm Clay a certified master automobile technician with 30 years of automotive repair and diagnostic experience.
From your description I would first suspect the fuel pump. I've had my share of defective parts over the years. If you had to replace the electrical connector(s) let me know along with the engine size. Typically the gray wire is power and the black/white is ground.
I hope this information is helpful. If you have any questions or run into any problems let me know.
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If there is no power at the pump make sure the 20 amp ECM B fuse in the under hood fuse-relay center is hot at all times, also check and see if the fuel pump relay is energizing during cranking.
Let me know what all you find