CHEVROLET SILVERADO FUEL PUMP

Whirring Noise From Rear Of Truck When Truck Is Moving Or Not, Fuel Gauge Not Working Right. Could It Be Fuel Pump Or Fuel Sending Unit?

Replaced Fuel Pump. Still Not Cranking. It's Acting Like It Wants To But Doesn't. It's Getting Fuel And Fuses Are Good As Well.

I'm Getting No Power To Fuel The Fuel Pump. I've Checked All The Fuses And Relays, And All Are Good. I Replaced The Fuel Pump, And...

Has Constant Power To Pin 87 And Ground At Pin 86. You Can Hear The Fuel Pump Prime Occasionally (but Only Does It Once And Does Not Do It...