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Old 05-15-2019, 09:38 AM   #1
Blktalhunter
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Default Auxiliary gas tank

Does anyone know of a place local (NW) that either makes or has smaller auxiliary gas tanks (15-20 gallons) that would slide under a pickup truck tool box and gravity feed into the main system? I see several options online for gravity feed auxiliary diesel tanks, but can’t find much on gas. And most those say they are not approved for gasoline. Would like to extend the distance between stops for fuel on longer road trips.
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Old 05-15-2019, 11:02 AM   #2
Rickster
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Default Re: Auxiliary gas tank

Do a web search for Brother's Chevy Truck. They are not local, but they ship. They specialize in aftermarket restoration parts and supplies for old Chevys. I bought one for my '70 half ton after giving up on the original behind the seat tank. Basically, years of sitting and waiting for a new motor caused corrosion in the tank. Then filling it with ethanol gas plugged up the lines. I mounted mine basically the way you are thinking. Not at all difficult.
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Old 05-15-2019, 12:03 PM   #3
1pump
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Default Re: Auxiliary gas tank

Yeah, I almost got one a while back, but I can't recall the name right now. It was steel, not aluminum, and it was set up for a pump instead of gravity, but you could probably modify it. And IIRC, the tank was a tool box/tank combo, and it wasn't cheap, somewhere in the neighborhood of one large. And it looked more like a tool box than a tank.

I'll try to locate the brain cell that has that info stored.
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Old 05-15-2019, 12:21 PM   #4
1pump
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Default Re: Auxiliary gas tank

Check out Transferflow.com. They have some trick combos that are approved for gas.
BTW, I'm assuming your vehicle is new enough to have a closed evap system, which could make a gravity feed setup pretty tough to do.
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Old 05-15-2019, 12:30 PM   #5
Blktalhunter
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Default Re: Auxiliary gas tank

Quote:
Originally Posted by 1pump View Post
Check out Transferflow.com. They have some trick combos that are approved for gas.
BTW, I'm assuming your vehicle is new enough to have a closed evap system, which could make a gravity feed setup pretty tough to do.
2018 Chevy 1/2 ton. I did get a response back from a company that will build custom tanks like this and ship. Although they will not set them up for gravity feed. They said it isn’t legal to do so. Waiting to hear what the cost will be..
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Old 05-15-2019, 01:56 PM   #6
fishinman
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Default Re: Auxiliary gas tank

How big is your gas tank? Some companies make higher capacity tanks for the factory location.


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Old 05-15-2019, 02:28 PM   #7
Captain Kirk
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Default Re: Auxiliary gas tank

Wilco, Coastal Farm Supply or Tractor Supply has some.
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Old 05-15-2019, 03:21 PM   #8
Califbill
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Default Re: Auxiliary gas tank

Maybe you can replace the standard tank. My 2019 GMC 2500 hd crewcab has a 36 gallon tank. Nice except when having to run the credit card while filling.
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Old 05-15-2019, 04:32 PM   #9
namu mac
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Default Re: Auxiliary gas tank

Quote:
Originally Posted by 1pump View Post
Check out Transferflow.com. They have some trick combos that are approved for gas.
BTW, I'm assuming your vehicle is new enough to have a closed evap system, which could make a gravity feed setup pretty tough to do.
These guys have what your looking for in addition to a larger replacemant tank for the OE one. They are spendy but they are one of if not the only ones approved for gas.
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Old 05-15-2019, 06:23 PM   #10
Bankbound
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Default Re: Auxiliary gas tank

You can’t have gravity feed on your truck without compromising the evaporative system. Your check engine light will be on and you won’t pass deq(if your rural it may not matter). Either way it’s dangerous as hell. A crash could be catastrophic or deadly or both. Just get a bigger tank, or a diesel.


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