Question about 2004 Chevrolet Avalanche

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My 04 Avalanche will not let me fill the gas tank as the fill nozel keeps shutting off as I have now tried to fill at 4 differant pumps. Yes the tank is near empty but I can hear the gas coming up the fill tube as if it were full causing the nozel to shut down. Could there be a vent tube clogged? There does not appear to be anything in the fill tube but I can only see about 6" into it. I did put a flexable grabber down the tube about 2' but came up with nothing. I don't think anyone would have put something in my gas tube but cannot be sure. The truck runs fine as i have had from new and now have 105k miles.

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  • Chevrolet Master
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Is there a check engine light on? The first thing I would do is look at the vent solenoid. GM has had issues with these either sticking closed or the filter getting plugged.

Find the charcoal canister. It will be mounted near the fuel tank. There should be a large hose attached to it. On the other end of that is is the vent solenoid. Remove it and see if you can fill the tank.

If you can than see if you can blow through the vent solenoid. With it unplugged you should be able to blow through it easily. If you can't than it is broken and needs to be replaced.

I beleive GM has updated the part and routing for that year. You can check with the dealer to see if that is the case.

Posted on Sep 30, 2010

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  • rlynch9 Sep 30, 2010

    Yes the check engine light is on but has been on for about 8 months now with no fueling problems or any problems. It is an emissions problem in the engine causing the light to be on although because the light is on I do not know when other problems occur that would also cause the light to be on. I will check as you described but do you know a web site where I can get a printout of my fuel system showing the components you speak about?

    Thanks for the help!

  • Jeremy W.
    Jeremy W. Sep 30, 2010

    http://c2.ac-images.myspacecdn.com/image...

    That is what the vent solenoid looks like. (copy and paste the link)

  • guest2004 Nov 30, 2010

    Mine does this also. Here is my cheap fix. Put the gas nozzle into your Avalanche and rotate it towards the back of the truck. (So the handle isnt up and down, now its sideways) Doing this means you cant walk off and wash the windshield while its filling, you have to stand there and hold it, but changing the angle of the nozzle works for mine, then it fills up fine. Can be a pain to stand there while it drinks down 20-25 gallons, but cheaper than replacing anything...

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My Avalanche does this. Here is my cheap fix. When you put the gas nozzle into the truck, turn it towards the back of the truck and hold it there while filling. Now it is sideways instead of up and down. Changing the angle of the nozzle seems to work. This means you can't walk off and go wash your windshield while the truck sucks down 20 or so gallons of fuel, you have to stand there and hold it, but its cheaper than replacing a part, or it will at least let you fill up until you get it repaired/replaced. I have been doing mine like this for over two years. Just my opinion though.

Posted on Nov 30, 2010

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