You do not have to pull the tank in '00+ to remove the pump or sending unit. You just have to remove the carpet from the trunk and a small access panel. It really is a quick job, but I wouldn't want to do it more than once in short order. I would have to agree that you would want to go with genuine AC Delco parts as BillBoost37 has mentioned. And GMPartsDirect.com is the cheapest AC Delco source.