Fuel tank gallons

[Frozenhosehead]

How many gallons does the fuel tank on the 2001 2500HD hold?

I am looking at purchasing the Stanadyne Performance Formula® Diesel Fuel Additive that a found from a local source in either a case of 12/16 oz bottles treats 60 gallons per bottle for $80 a case or 6/64oz bottles that treats 250 gallons a bottle for around $165 a case. This is the price in Fairbanks which seems a little high but when you add in shipping from the lower 48 it should equal out in the end.

[05_LLY]

Short bed = 26 gal.
long bed = 34 gal.