1996 Chevy Truck Fuel Pump Short?

I have a 1996 chevy k1500. One day the starter went out on it, and I changed it only to discover the fuel pump had gone out as well. I replaced it with a brand new one. I also changed all of the fuses related to the fuel. However, the fuel pump will still not operate. I got a ohmeter and there is power leading to the fuel pump and on some of the wires on the fuel pump itself, but no power to the ground wire. I tried to re-ground the wire to the frame of the truck, and it ran for a few minutes, so I tried to test drive it and made it about 3 blocks and broke down again. There is no sound at all coming from the fuel pump. All of the ECM fuses are fine. Any ideas where this short might be stemming from? I had a similar 96 2500 that was 2 wheel drive that also ran on CNG and had similar problems. I did not find or fix the problem with the first truck because it had a cng short and caught fire. Any help would be appreciated. I'm tired of breaking down in this truck.