Question about 2002 Chevrolet Avalanche

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Fuel pump failure

I've had 9 fuel pumps on my 2002 Avalanche 2500 including the one it came with. The dealer can't find anything wrong and says it's just bad luck! They want me to keep the fuel tank at least half full so the fuel pump won't overheat. Tried that and they have stilled failed. I have lifetime replace Delphi pumps put back in but that doesn't make me feel any better when the pump goes out in Kansas City during rush hour!!!!!!!!!
After replacing the fuel 8 times I'm ready to burn it.

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  • karl400 Sep 15, 2008

    The dealer said that the pump failed because it gets hot if there isn't enough fuel to keep the pump submerged so as to keep it cool while working. They said that they have checked everything and can't find any reason why it would fail except for the over heating. Same with the dealership in Kansas City where it broke down during rush hour. My old mechanic says that Delphi pumps are bad quality and that a Bosch pump will fix the problem.
    No one told me when I bought the truck that I need to keep the fuel tank at least half fuel. The owners manuel doesn't tell me to keep it at least half full so the fuel doesn't over heat and burn out the fuel pump. I doubt I would have spent $40,000 buying it.

    Also, when I talked to GM, after about 20 minutes the lady just said that she would report that we couldn't come to an agreement over what was the problem and close out the report.



  • Anonymous Dec 01, 2008

    I have a 2002 1500 avalanche and I have owned it from 2005 I have already changed the fuel pump three times.



    This definitely is a manufacturing problem.

  • brettlindqui Feb 14, 2009

    I have also gone through four fuel pumps on my 2002 in the last two years. They seem to last about 9000 miles. Nobody has a clue why it keeps failing. i was also told to keep the tank half full and I keep at least that and still have had two pumps go since then. Anyone???

  • ocsimi Feb 25, 2009

    is the fuel pump exspensive mine just went out and it was rush hour am and i almost got hit, the truck just died no warning besides the warning light going on while it was dyeing

  • Anonymous Mar 11, 2009

    my 2002 avalanche 2500 155k 3 pumps . last one only got 3k on it .truck is in driveway dead . anyone got a match

  • Steven Brock May 11, 2010

    Did they say how they failed? Hose, pump itself, hose, etc...

  • ramoncornejo
    ramoncornejo Jan 10, 2013

    i have 2003 avalanche the fuel pump just quit,my mecanic replace the pump ,but now wont star they said the avalanche turn in to mode, or antitheft ,thoes any body know what happen, now they said i have to takad to the dealer to program the sistem,

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Has the power supply been checked as constant and spike free?Have you opened up the pump to determine exactly why it failed as that would give you an area to explore.Also make sure the pressure relief valve is working at the fuel rail correctly.check that fuel return line is free and clear

Posted on Oct 12, 2008

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Thought it was just me im one my 6th pump today. i have tried all different brands all last just as long.

Posted on Oct 10, 2012

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My 2500 also started going through pumps and after extensive investigation found the pump in the secondary tank is fried and without the secondary pump running in tandem there is not enough pressure for the front and back end system. I tried to purchase a replacement tank and pump from GM and they said the parts were discontinued in 2009. Please email me if you are having a similar experience. frankpinero@gmail.com

Posted on Sep 11, 2012

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I have had my 2002 Z71 from April 2005, purchased second hand, and have changed fuel pumps four times. This is either a manufacturing problem with GM or a problem with the manufacturers of the pumps. I have been told that the bosch pumps are better and of higher quality and should work longer. It has also been suggested that a outside tank replacement pump be added to the existing pump after it has failed. So that you leave the failed pump on the tank and install a pump outside the tank which would being the work. I may try this but I will first try the bosch pumps after the next failure.

Posted on Jan 31, 2010

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I beleve the some pumps have a manufacters defect not sure what it could be but some work longer then others regardless of fuel level

Posted on Jul 05, 2009

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Keeping the tank mostly full should be comon pratice on any fuel injected vechile. Second, I've never heard of any vechile going through that many pumps, EVER! And that includes even dealerships, where I have several friends working at. So if the aftermarket fuel pump works, I'ld be suprised. I'ld like to know how if it dose solve your problem. Sorry, I have no idea what could be causing your troubles.

Posted on Sep 16, 2008

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I recommending go after market pump, you being throught 9 pumps already or there must be something that they are missing it sound like a bad ground the way to find out that ground this req ohms law you are losing one of the three volts, amt or resistance write back if still have the problem

Posted on Sep 13, 2008

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The bosch after market pump is EXPENSIVE. $1000. Dont believe me, look it up. I would go with the power issue. The first time that pump was changed could be the reason. It is easier to tip the tank and stretch on the lines and wires to change the pump. this could have caused a shorting issue. That is where i would look. pumps overheating? Does that make sense....in a fuel tank. Good luck

Posted on Dec 01, 2008

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