This might be a good time for followup on my old gas tank post. The new tanks are all plastic. The small ones are about 26 gallons and the larger ones are about 34 gallons.
I spent the time to measure the tanks in the 3500HD vs the 2500HD. Sad to say they are the same. The extra capacity in the 3500HD comes from the second tank that goes where the spare tire would normally go.
Looking at the long bed trucks, it appears possible to remove the exhaust and mount a 26 gallon tank backwards next to a 34 gallon tank, for a combination of about 60 gallons. Use the stock 3500HD dual tank hardware to integrate the tanks. Since removed 26 gallon tanks are pretty cheap on Ebay, I might just try it. The big problem will then be what to do with the exhaust! Is there an outside-the-frame exhaust setup out there? Not an easy problem to address due to the cat and the deep frame on these trucks.
Brand new GMC '04 DMAX CC 1 TON...dealer filled tank on delivery, so no idea on how much they actually filled.Went to fill up after my DIC said low fuel and 26 miles left. Figured on filling to at least 34 gallons with my long bed. 29 gallons and was comming out the top... So does my 04 have a smaller tank????I have a spare tire...Did I loose out on fuel capacity??? My '02 cc sb dmax was a 26 gallon tank....I was looking forward to less fill-ups.
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