GMC Repair: 98 GMC SONOMA SINGLE CAB, gmc sonoma, fuse box

Question
I HAVE THIS SONOMA IT IS A FOUR CYLINDER AND I HAVE PUT THREE FUEL PUMPS IN IT YOU BE DRIVING DOWN THE ROAD AND THE FUEL PUMP STOPS WORKING OR JUST SITTING IDLE IN THE YARD LIKE SOMETHING IS HEATING UP AND SHUTTING OFF THE PUMP WHEN YOU LET IT COOL DOWN IT NORMALY STARTS YOU CAN HERE THE FUEL PUMP IT WILL START EVERY TIME BUT IF YOU DONT IT WILL NOT  MAYBE YOU CAN HELP ME WITH THIS PROBLEM THANK YOU STEPHEN

Answer
Hi
I would strongly suspect the ground for the fuel pump circuit.
I think it is located almost on the very end of frame. It is a ground splice pack. It'll be a small plastic "box" with 4 or 5 wires going in one end and then bolted to the frame. You could also check the fuel pump amperage draw, see if it is drawing too much current. That is how you could determine if the pumps are bad.
Check ALL the related wiring for the pump. From the underhood fuse box down all the way along frame to tank. Remocve tank and check the connector where it plugs into pump assy. Make sure the pins are not spread out (terminal tension). And check the GROUND circuit.
I Hope this helps.
Good Luck
Pawl