Bigfoot mods for newer trucks

Question

I have a 1988 bigfoot on my 2006 gmc diesel
They did the mod so it fits newer trucks. We are just getting ready to leave and I checked the plumbing. The Grey and black water are tied together, now I cannot dump Grey without doing black anyone else have this problem

racedrvr · Answer

It sounds like your black tank valve is leaking, or stuck open. Perhaps some debris is in the valve holding it open.

candjmc · Answer

No the Grey tank ties into the same pipe as the black But the Grey valve is uptream,so when the Grey is open the black valve stops it

candjmc · Answer

Never mind sorry please close the thread Im a lugan

sparky87k5 · Answer

What is a "lugan"?

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Bigfoot mods for newer trucks

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