The fuel pump in my 2004 Chevy Blazer went out the other day with nearly a full tank of fuel left (of course). Currently in the process of getting the fuel siphoned and tank dropped.

I'm having trouble removing the fuel fill hose that goes into the back of the tank. I have removed the standard hose clamp however there seems to be some other locking clamp that I can't seem to get off! The hose itself spins freely and is free of corrosion and dirt.

Anybody have any ideas/suggestions?

Thanks