Urgent!!Unleaded Fuel in my DMax, Anti-siphon? - Chevy and GMC Duramax Diesel Forum
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post #1 of 9 (permalink) Old 03-24-2017, 06:37 PM Thread Starter
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Urgent!!Unleaded Fuel in my DMax, Anti-siphon?

After telling my wife she can't drive my truck cause she might put gasoline in my diesel, I am the one that ended up doing. I realized it after putting 17 gallons in the tank. So it looks like the fix is to drain the tank, but many are telling me it may have an anti-siphon tank? Does this make sense? Any good ideas for how to drain about 23 gallons of mixed fuel? And once i get it out what do i do with it?

Thanks in advance.

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post #2 of 9 (permalink) Old 03-24-2017, 06:45 PM
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If you only added a few gallons, you could add a quart of 2 cycle oil to help dilute the gas, but that much gas, best to remove as much as you can. Probably a good idea to add a few ounces of 2 cycle anyway, because there will still be some gas mixed.

Only way to know if it has a anti-siphon is to see if you can insert a hose in the fill neck.

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post #3 of 9 (permalink) Old 03-24-2017, 06:49 PM Thread Starter
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ok. If it is anti-siphon, drop the tank?

Looking for my first Duramax Diesel
Eventually would like to get it lifted

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post #4 of 9 (permalink) Old 03-24-2017, 06:53 PM
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I don't think it's anti siphon. Although I forgot what the lip looks like at the last part of the fill tube. Dropping the tank isn't bad. I can have the tank out of mine in about 15-20 minutes. I know it doesn't make you feel better but this would be a great time to install a sump. Good luck

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post #5 of 9 (permalink) Old 03-24-2017, 07:01 PM
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Drop the tank is going to be the best bet.

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post #6 of 9 (permalink) Old 03-24-2017, 07:20 PM
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I've never put gas in my truck but I have been able to siphon fuel from my 09.


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post #7 of 9 (permalink) Old 03-24-2017, 07:59 PM Thread Starter
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Originally Posted by HD Dmax Machine View Post
I've never put gas in my truck but I have been able to siphon fuel from my 09.
Lol, something i didnt see myself doing either. Lesson learned.

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post #8 of 9 (permalink) Old 03-24-2017, 08:17 PM
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Quote:
Originally Posted by wade_660 View Post
I don't think it's anti siphon. Although I forgot what the lip looks like at the last part of the fill tube. Dropping the tank isn't bad. I can have the tank out of mine in about 15-20 minutes. I know it doesn't make you feel better but this would be a great time to install a sump. Good luck
this..

Sump time. you get to drill a hole in the bottom of the tank...

Check out Bama Off Road for a Bean's sump.....

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post #9 of 9 (permalink) Old 03-25-2017, 04:52 AM
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Quote:
Originally Posted by TexasRedNeck View Post
this..

Sump time. you get to drill a hole in the bottom of the tank...

Check out Bama Off Road for a Bean's sump.....
I have to agree with this^^^. Just install a sump.

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