Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
Hello and welcome to Just answer.com, Super mechanic here. About your vehicle.
You will want to check the ECM 'B' fuse in the under hood fuse box for power on both sides.
There is also a fuel pump prime connector that you can run power too just to see if the wiring is okay from the relay to the pump. If I remember right, there were some that had connector packs under the driver seat, that would sometimes get a bad connection. Here is a diagram that may help find the power loss.