Questions & Answers for: GMC how can you tell if your fuel pump is bad

...fuel tank. I tried to turn on the ign. switch without result. Can you tell me where the harness is located or how to jump the wires. I know that it will pump fuel while cranking. get a long wires and ...

...tell you almost for certain your fuel level sending unit is bad, I have been able to fix them though. It requires removing the gas tank and then the fuel pump. You can if your inclined, bend the ...

...tell if a fuel relay is bad? If the fuel relay is bad, will the fuel pump still work? drop the tank ... use a brass punch to loosen the ring ... to find/replace the pump. the relay is operated by the ...

it`s your fuel pump. Plus Check emergency shut off switch, in your manual it will tell you how to reset the emergency shut off switch. If all this fails to work, I would say that your fuel pump is bad

...fuel pump is bad you will not hear it prime up.. Turn your car to ACC (not start) and see if you hear the electric whuzzzzzing sound of the pump activating. this should tell you if it is working or ...

...fuel pump relay ,gauges are not working and fuel pump is not working i have changed computer,nothing unplugged oil pressure switch crossed it fuel pump comes on So If you jumped the two wires at Oil ...

...fuel into the throttle body and will it start that will tell you if the ignition is ok or not and also tell you if you have fire to the cylinders. If it start right up and shuts off you either have a ...

how do I tell if the fuel pump relay fuse is bad or not? When you cycle ignition to on position , you should hear fuel pump relay under hood buzz for a few seconds then it stops .

Do you hear the fuel pump work when the key is on you might have a bad fuel pump.you can check pressure to see if it have a bad reading. Call auto parts store they can tell what the pressure should be

...fuel pump relay and starter relay . what else can be the problem Have you had a computer scan done. It is likely if a sensor or component is bad, the computer will tell you and save you the time of ...