Question about 1999 GMC Suburban

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1999 gmc suburban fuel pump

I have replaced my fuel pump in my 99 suburban 2 times in the last month. After a 100 or so miles on my second pump, it decided not to work. Is it the fuel pump or possibly something else. I cant hear it turn on when you turn the key like I normally can. I have also replaced the relay switch.

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I had the same problem with my 99 suburban. There was a memo sent out by GM to all of the service shops that tell them when you replace the fuel pump or just desconnect it you need to replace the pigtail wiring harness that connects to the pump or it will burn up the new pump. I went through 3 pumps before I found this out after I replace the pigtail it fixed the problem.

Posted on Jun 04, 2009

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I have to ask this, did you chg. the fuel filter when you chg. the pump? its a important part of the fuel dilivery system, when they plug the pump works harder and shortens pump life, even with in a 100 mi. Also is the pump from g.m. or aftermarket? There are different manufactures that make the pumps some good some bad. Also the pump has to be submerged in gas in order to keep cool, if you run around with less than a quarter tank alot, that will burn up the pump too.

Posted on Feb 11, 2009

  • earl17201
    earl17201 Jul 30, 2013

    Yes the fuel filter was also replaced.



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