Question about 2001 GMC Sierra 2500HD

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2001 gmc serria 2500 hd 4x4 fuel system

Changed the fuel filter fuel pump working. Not getting fuel. Checked the fuses and they are all good. What should I look for now?

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Check your power nad ground at fuel pump plug if power and ground are ok you have a defective pump

Posted on Oct 13, 2008

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2001-grand-marquis-not-getting-power-0mjk1nw4aqo52z33ebnvxua0-3-0.gif Check fuse #8 in the central fuse box inside the car

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definitely could be something smaller. Like a relay....even a filter.
Few things to try:
Just turn the key to on, not start and see if you listening to the fuel tank if you can hear the pump going. If not, its either the pump or the relay.
Most of these trucks have another switch that kicks in after the enigine is started and runs the pump so you may be able to spray starting fluid in it while cranking it and get it to start. Then the other switch may kick in and run it. that will let you know if its the relay or what. Let me know what you find. I just replaced a relay on a 93 and it was only $8.....worth a try. Also, there will be a fuel pump fuse, probably close to the relay, could be that!

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1997 GMC K1500 4x4 5.7 ex.cab SFI injection system


Hey there boatright33,

A few things things immediately come to mind.

There may be a problem with the engine controller. You could check the ODBII onboard diagnostics. Auto part stores will usually do this for you at no cost.

When you pulled the ones that were/went bad, how did the filters look? Could there be particulate matter still in the tank causing them to fail.

I always put this one off until last. Check the injectors. Are they gummed up?

Let me know what you find out
Mike


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