filling up issues

Discussion in 'Chevy Silverado Forum (GMC Sierra)' started by nabisco_12, Jul 21, 2012.

  1. nabisco_12

    nabisco_12 New Member

    it doesnt matter where i go to get fuel that damn pump pops off all the time, its nearly imposable to get gas in the truck, i have tried to hold it different ways and it doesent help!! what is going on? can i put a bigger pipe to the tank, i think its to small and restricting flow??any ideas???Thanks!
  2. rileyjr16

    rileyjr16 New Member

    Vent could be clogged up with something and not letting the air being displaced out therefore causing vapor lock (I THINK)
  3. tbplus10

    tbplus10 Super Moderator Staff Member

    I have the same problem on my Chevy, but not on my other vehicles.
    I've found if I stand on my head while singing the star spangled banner and wiggling my toe the tank doesnt get full any faster but people do stop to stare.

    A few years ago I bought a device for my bike that looks like a can coozy without a bottom on it, it helps a lot getting the tank full on the bike, it was worse than the truck and there was a few times I had to go find another filling station it got so bad, I keep meaning to try it on the truck to see if it helps.
  4. nabisco_12

    nabisco_12 New Member

    what vent?
  5. Sierraowner5.3

    Sierraowner5.3 New Member

    it could be the pump nozzle it self, i noticed when i loved to virginia I had that problem, in minnesota it was never an issue, but her it was in my old 05, and now in the 11 its not a issue at all.

    i seem to recall we had a thread about that on here someplace, couldnt find it with the search tho.

  6. TexasTechRaider

    TexasTechRaider New Member

    On my 09 Silverado it's a pain in the rear, I have to readjust the pump at least 4-5 times in order for it to stay on. I found that by pulling it out a little normally works. My Tahoe does it occasionally but the Silverado is much worse!
  7. PantheraUncia

    PantheraUncia New Member

    I have this problem also depending on the gas station/pump I am at and it is one of the most annoying things..... I want to get my gas and get out.... not having to take 1 hour for a 5-10 minute fill up would be nice. I has to do something with the back presure of air or something. I would love to get it fixed.
  8. jnbama

    jnbama Member

    Pull the nozzle out a little till the pump quits clicking off and high pump speed will cause it to click off . Read some tips to fuel early or evening while cool, gas will be be dense and get more . Fill till pump stops wait a few seconds and pump till clicks off again tank will completey full
  9. the phantom

    the phantom New Member

    Ive heard the vent selonoid could be stuck in the closed position can cause this problem. Also if you notice when you remove your cap and have a LOT of pressure this is also a sign of a bad or slow vent selonoid. If the vent remains closed it does not allow the air to escape as your filling the tank. This is a common problem causing the cel to come on with an emissions code. It also has made my fuel gauge read incorrectly at times when mine went bad. Im awhare that there is a service bulletin on the early 2000's to relocate the vent selonoid because its located near the rear diff and can get clogged. I just replaced my selonoid on my 03' for $40 instead of getting the $120 relocation kit. I had to physically match one up though because my part number was superceded with the new relocation kit part number. I know my buddies 07' was already factory relocated so not sure what year they changed it.
  10. Skippy

    Skippy New Member

    As I understand it (and this makes sense) the fact the gasoline is housed in the ground makes the temperature VERY stable (thus not having a big density change during the day). On one "exposed" episode on TV, they showed the temperature was 62 degree all day along and all night long. The only major time it change was when the gas was being put into it from the fill truck. (just one data point though). Because the storage is in the ground, there is VERY little temperature difference (it's why root cellars remain cool all day) even between day/night. Early evening is probably worst, though if you're looking to measure a degree or two, since the ground has had a chance to warm all day. (still talking about 1-2 degrees at the most!)

    'Swhat I understand anyway. If you've got other data, Love to hear it!
    Last edited: Jul 21, 2012
  11. jnbama

    jnbama Member

    I would enjoy watching you standing on your head singing Star Spangled Banner and wiggling toes,:sign0020: I just say "dang it "
  12. nabisco_12

    nabisco_12 New Member

    I took the truck in and the shop said the canister was full of crap, so they said that if it was un hooked that would get it to fill better. so it was un hooked lol but still having issues, what other things could it be?
  13. Patman

    Patman New Member

    my 2006 did the same thing and all i did was replace the charcoal canister and clean out the vent solenoid all is located to the right of the fuel tank. if you are going to tackle the job yourself be very careful with the lines on the cannister. as soon as i did mine it filled up fast and has stayed that way ever since. it used to take me 45 mins to fill.

    - - - Updated - - -

    030925TC03-838.jpg here is what you will most likelly need... replace #1 and clean out # 3
  14. the phantom

    the phantom New Member

    The canister and vent selonoid, are 2 different parts. If your vent selonoid is clogged or stuck shut it would also cause hard filling issues. Im not awhare of any other problems that could cause these problems.
  15. j cat

    j cat Active Member

    the vapor canister gets damaged from over filling the fuel tank. what can happen is you fillup on a cool morning and park the vehicle in the hot sun after a very short trip. the fuel expands and floods the charcoal canister. then the charcoal migrates to plug up these venting lines/controls.In the winter this occurs with those that have heated garages. fill to the 3/4 level . since they found this plugged up I would consider replacing this canister and cleaning all the venting lines. If not a good chance this will continue.
  16. I had this problem with my 07 silv classic. I ordered the relocation kit for the fuel vent and problem solved. Mine also was giving me the 'tighten gas cap" msg and threw the code p4066 (if I'm remembering right). The kit was an easy install. No trouble since. Best of luck on your repairs.
  17. nabisco_12

    nabisco_12 New Member

    thanks guys im taking it back in, if the canaster is un hooked would the selonoid still be hooked up??

    noodles where did u get the relocation kit?

    patman is cleaning the vent noid part easy? no special tools or funky stuff? just pull it off and clean up and reinstall?

    thanks so much guys! maybe i can just do this at home!
  18. j cat

    j cat Active Member

    the canister is the venting system. the solenoid is connected to it. the large line is the venting line which goes to the solenoid. with the canister damaged this is why most times the venting is impossible/restricted causing it to spit back on fueling.

    if all the lines are disconnected and not plugged you should have no problems fueling.

    since it was determined the canister is defective cleaning should not correct this.
  19. nabisco_12

    nabisco_12 New Member

    this is all they did can i just bypass the noid and canister and put the two hose's together? where is a good place to go if i want to replace the crap?


    Uploaded with
  20. Patman

    Patman New Member

    the solenoid would take about 5 mins to clean out and is very simple (mine was full of gravel) and when you get the canister out, being super careful when unhooking the lines, blow out all the lines with compressed air. when you have the old canister out hold it against the new one and notice the weight diff. when everything is clean put it all back together the way it came out and enjoy.

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