Looking for a cheap Auxiliary Fuel Tank solution

Discussion in 'Towing' started by Tom P, Nov 15, 2017.

  1. Tom P

    Tom P I'm Awesome

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    I have a 2000 K3500 CCSB Dually and 7.4L engine. Since its the standard bed, I have a 25 Gallon fuel tank. So far this is the biggest gripe about my truck (along with the 6.5ft bed). I thought about an in bed tank but we would lose quite a bit of storage, and most of them are rather expensive. We took this truck on some long-ish distance camping trips and my horrific fuel mileage (working on some issues with that) and thimble for a fuel tank cause me to stop and fill up about every 150 miles to stay safe. I have seen some of these 1 Tons came with auxiliary tanks, but I have not found one to purchase or any other information about it. Other than you can buy a tank sender and lift pump for them on rock auto. I thought about adding either a suburban or tahoe tank between the rear frame rails. I don't have a spare tire so perhaps that would be a good place to put a tank. I would either need to weld bungs on both tanks and run a large hose between the two tanks and make essentially one large tank but that would require a breather of some sort, or plumb in a filler neck to somewhere and sender unit and fuel pump with a fuel tank switch and relay. It would be nice to add another 150 miles to my fuel capacity so if we ever decide to do a long haul trip we aren't stopping ever 2 hours for fuel.
     
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  2. Supercharged111

    Supercharged111 I'm Awesome

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    My intent is to buy/build a porkchop tank or 2 to put in front of the bed fenders. I'd use gravity feed and a shutoff valve to refill the stock tank.
     
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  3. Tom P

    Tom P I'm Awesome

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    A porkchop tank?
     
  4. Supercharged111

    Supercharged111 I'm Awesome

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  5. Tom P

    Tom P I'm Awesome

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    Ah I get it... Looks like a good idea, but I was hoping to find something that wasn't going to cost me and arm and a leg.
     
  6. BowtieBrody

    BowtieBrody Jesus Murphy!

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    I think Dave (@88GMCtruck) was devising a plan to put the larger gas tank out of the long beds into his stepside, I don't know if he ever made any progress or if he scrapped that idea.
     
  7. Tom P

    Tom P I'm Awesome

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    I'd like to see if I could get the suburban tank to squeeze between the frame rails where the spare tire would go. Not sure what I'd do with filing it but that would ad 35 gallons of capacity
     
  8. Supercharged111

    Supercharged111 I'm Awesome

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    I think in a shortbed you're relegated to the Tahoe tank.
     
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  9. Tom P

    Tom P I'm Awesome

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    Good point. I'll settle for another 25 then...
     
  10. BowtieBrody

    BowtieBrody Jesus Murphy!

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