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Old 05-24-2016, 07:00 PM   #1 (permalink)
artementy
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Join Date: Jun 2015
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Auxiliary fuel tank Enable in PCM

We installed an auxiliary 12 gallon fuel tank from a 2004 Suburban into my 2006 gas Express van in place of the spare tire carrier.

When you're towing, and have a blowout, the rear of the van is usually so low that makes it so much of a pain to get that spare wheel from under the frame.
So I put the wheel in a cover, it's clean and soft and I just secured it inside.



For now, I have two temporary switches - one to turn on the aux fuel pump to transfer gas into main tank and another to switch the fuel levels on the dash. I have to manually time 20 minutes it takes to transfer the fuel and not forget to shut it off. Also, the dash fuel level does not update unless the vehicle is put in Park or Neutral. So ideally I would want this to be controlled by the PCM and eliminate the switches, the same way it is done on Suburbans and pick ups.

On my tune, I cannot enable the dual tank option, this option has to be there from the factory. Does anybody have a tune file from a 2006 gasoline truck with dual tank set up?

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2006 Savana 3500 8.1
2016 Savana 3500 Diesel
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