Do I have to drop the gas tank to replace the fuel pump in my 2004 Pontiac Grand Prix GT?

No,you do not have to drop tank,there is a panel in your trunk under carpet near back seat ,remove cover and there it is,,good luck with it

Thanks I found that and replaced the level sensor but I'm having trouble getting the metal ring pushed down enough to lock it back in place. Any thoughts?

Yes, sometimes,the ring is tuff,the gasket has swelled,if you can not lock in place by pushing down,and rotating,replace gasket,should help.

Thanks again. I found that if u beat on it for 2 1/2 hours it fits just fine lol. But yes they had a new ring for just $8.00 at the parts store.

love that BFH solution.