Aux diesel tank in bed question...
I purchased a 2008 Silverado and it already had a 74 gallon aux tank in the bed hooked up to the fill pipe of the main tank. I sold the 74 gallon tank and purchased a smaller 37 gallon but was told no...
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My RDS aux tank has a tank shut off and a float check valve in the tee on the filler pipe. The check keeps filler pipe from filling up to the truck fuel cap. The only problem I've had in 8 years of aux tank use is I can't leave the tank "on" all the time as that throws an engine code when the computer doesn't see the main tank fuel level decreasing while driving. I have a 99 gal tank/toolbox. It's been great for range increase and for fuel price shopping.
