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jeffjcalweb's avatar
jeffjcalweb
Explorer
Jun 13, 2020

"Auxillary" Fuel tank vs installing a new/larger tank

Hello - I have a 2017 Ram 2500 w/Cummins with the 6'4 bed, and just purchased our first fifth wheel. I'd like to add fuel capacity for towing and have seen a few threads here with some discussion...
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BarryG20's avatar
BarryG20
Explorer
Jun 17, 2020
Being able to reset the tank size in ecm is manufacturer dependent. I was told Fords can (at least some years) Ram no and GM cant remember what I was told on them thinking it was no but really cant remember.

I can say on my 17 ram long bed with the Titan 55 gal tank I can go close to 200 mile before it drops below full and when it hits close to E I can put in about 46 gallons so 8 or 9 gallons left in tank.

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