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Q: How do I drain diesel fuel tank on 2008 Ford F-250 Super Duty

I need to drain the fuel tank is there a drain plug? Is the something in the filler neck that prevents using a siphon hose?
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There probably isn't a drain plug. I assume you've looked for yourself and haven't seen one. There usually isn't on American vehicles. You probably can't get a siphon hose into it either. Generally, you either lift the bed or lower the tank to get into the top of the tank where the fuel pump module is and siphon or pump it out.
Thanks. I wound up disconnecting the fill nozzle under the bed. It was clamped on just above the tank allowing me to siphon from there. Really wasn't to hard.
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