Several possibilities, most of them talked about here(link) different
solutions for various causes.

http://forums.corvetteforum.com/show...=Fue l+sender

tater wrote:

> Hey All,
> I am having trouble with my fuel gauge on my 2000 model. when it gets a
> little below a half tank it drops to empty???
> Has there been a recall on this?
> Thanks in advance
> Mike
>
>