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Old 07-25-2019, 08:20 AM   #1
4x4dually
 
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Fuel Tank Inlet Issues. Gas Pump handles shut off.

Paw-n-law has an issue with a 2013 GMC 2500. It's gas, but every time he puts the gas pump nozzle in now and squeezes the trigger, the auto-shut off cuts the fuel. His gravity flow tank works ok but any of the station pumps won't.

Anyone had this issue? Is it a function of a fill tube issue or a vent line issue?

I'm going to google it now but thought I'd ask here in case someone has had this trouble.
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Old 07-25-2019, 08:25 AM   #2
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Or is it an Evap canister issue? I guess I need to research and see if those trucks even has an Evap? More EPA bullschitd.
 
Old 07-25-2019, 08:50 AM   #3
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I have the same issue with my '79 Silverado. I stick the nozel in upsidedown and at a 45* angle and it flows just fine. I blame it on the way the fill tube flows, but it has done that since it was new per my uncle who bought it new. No idea why one would just start having an issue unless the vent tube got mud dobbers on something clogging it up.
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Old 07-25-2019, 08:58 AM   #4
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From what I'm reading these trucks have an "Evap" canister full of charcoal. Some bullshidt the EPA mandated on them to "save the planet" or some crap. It becomes clogged. I've got paw-n-law trying to find it. His truck started doing it lately, not something it has always done. Probably plugged up somewhere. Just need to figure out where.
 
Old 07-25-2019, 10:43 AM   #5
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Vent solenoid and/or evap canister is plugged with fine dirt OR the in bed gas tank has way over filled the tank and the canister is full of fuel. It’ll eventually set an evap code. 2013 is right on the break point from when we moved the fresh air for the vent.

This will cover it I think, I didn’t watch the whole video
Chevy Truck Hard To Fill Gas Tank - GM EVAP Codes P0442, P0446, P0455 or P0449 Vent Solenoid replace - YouTube
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Old 07-25-2019, 11:25 AM   #6
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My '79 has that stupid charcoal canister on it also, wonder if that is the culprit. I'll have to check on it the next time I go to fill it up, in a few years, I think I have put 5 miles on it in the last 10 years.
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Old 07-26-2019, 08:43 AM   #7
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Or 10 Suburban does this, I dug into and the probably is they vent the tank fill back into the fuel filler neck roughly 3" from the tip. If you rotate the nozzle when filling it wont trip out. I don't know why but it also helps if you shut the vehicle off when filling. Which I hate special in the winter months, but it better then standing outside freexzing my fingers off trying to get the dam thing to fill.
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Old 07-29-2019, 05:55 AM   #8
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He took the canister off it, beat around on it, blew it out, cleaned all the dirt out of the vent lines, etc. Works great now. It is just air restriction.
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