Why isn't there any voltage going to the fuel pump on a silverado?

Answer 1

AnswerBlown fuse or bad fuel pump relay

The above answer could be right but not always. I have the same problem now on a 2002 Silverado. I changed the fuel pump, filter, checked the fuses and the fuel relay but still no power to the pump. I then jumped a wire from the #30 to the #87 in the area where the fuel relay came out. The pump will work then. But putting back in the relay, then another one like it, to make sure, the pump still will not work. I checked the power at the #9 on the RED plug going to the PCM. There was power there, but when I checked the wire coming out of the PCM with a test light, there was no power there when I turned on the key. I knew the PCM must be bad. Sooooooooo, I ordered a PCM, had it programmed to my vin# and installed it. Still no power to the pump. I have eliminated everything except the fuel pressure regulator under the upper intake. That can regulate whether the pump gets power or not. Even when I wired the pump direct with the jumper wire from the #30 to #87 under the relay, the pump works however, I think the fuel is being returned to the tank instead of going to the injectors.

I don't think yours will be as bad as my situation, but just wanted you to know what other things can cause the loss of power to the fuel pump.

The PCM controls the ground to the fuel pump relay.