Question about 1991 GMC K1500

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1991 sierra 4wd 2500 pu replaced inline filter, and fuel pump

The engine fired up and was dependable the rest of that day.this morning, it would turn over, but no fuel to throttle body. thank you.stranded again

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Fuel pump

Posted on Nov 27, 2008

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Everything was running great and suddenly the engine fires but does not turn over in my 96 sierra 2500 where is the the fuse for the fuel pump i cannot locate it..please help


Hi, your pump is powered by the ECM-B fuse in the engine compartment relay box. The fuel pump relay is turned on by the ECM. You may want to browse my tip at http://www.fixya.com/cars/r5821173-doesnt_car_start_gasoline_engines to aid in your troubleshooting efforts. Please let me know if you have questions, and thanks for using FixYa.

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I'm sorry to hear that. The fuel pump is in the fuel tank. Make certain that all the rest of the fuel system working before you have to drop the tank. 1.Fuel pump relay or any fuses.2.Replace fuel filter,(inline between tank ane pressure regulator). 3.Trace power and ground wires from tank back to relay looking for breaks or pinches. 4.Look for a pump reset switch. If all that is good, then replace the pump. Good luck.

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I HAVE A 1991 GMC SIERRA PICKUP THAT WON'T START. WE'VE ALREADY CHECKED THE IGNITION MODUAL AND HAVE REPLACED THE COIL,DRIED OUT THE DISTRIBUTOR CAP. IT HAS SPARK IT JUST KEEPS TURNING OVER WITHOUT FIREING...


If you are getting spark then it may be a fuel pump problem or fuel pump relay or inline fuse. Always start Fuel system troubleshooting by replacing the fuel filter or filters! You may be able to apply 12 volts from the battery (use a fused line) directly to the 12 volt side of the fuel pump and listen to see if the pump runs. Also may need to check that it is getting a good ground to the fuel pump. Then if the fuel pump does not run independently, replace the fuel pump. The fuel pump relay is computer controlled and several other things give the computer inputs which then controls the voltage to the fuel pump relay.

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1 Answer

Is there an inline fuel filter in a 1997 gmc 2500 sierra truck wi


On the drivers side frame rail (inside) is your fuel filter. Cheap to replace. But if you don't hear the pump cycling prior to attempting start it is more than likely pump in the tank. Check fuses first though. Big job

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