Question about 1989 GMC C3500

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89 GMC C3500 454/w FI will not start.

I was informed that the fuel pump is in the tank, and before I drop the tank etc. what can I do to make sure it's the fuel pump? It will run on starting fluid, so it must be getting fire.

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  • jrk05a May 11, 2010

    You may want to go ahead and replace your fuel filter. Every once in a while a fuel filter will get so plugged up that it won't let much gas through. Trace back your lines and see where you are and are not getting gas before you drop the tank.

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Check you fuses inside and under the hood frist.then see if you have power to your pump. you can try hitting the bottom of the gas tank. some times it will make your pump work. you can take your gas cap off and see if you can hear the fuel pump work . good luck

Posted on May 08, 2009

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