the possibility might exist that you at least need to clean the tank. Personally if the tank is icky enough to need some sort of sealer or something I would get a new one, they aren't horribly expensive, (at least a pickup, I don't know about suburbans) but if you are relying on this vehicle, it would be a bargain. I fought mine for a while, I wish I gotten the new tank much earlier. Keep in mind the filler tube can provide you with a lot of rust in the system as well, the fuel pump with the glass bowl has a pretty fine screen in it, so you don't have to cut into your nice new fuel line to install a suction filter. Oh yeah, your story brings back lots of memories in boulder...
