How do I remove the sun shade 2001 Bonneville.

So you want to remove the sun visor or sun shade for the sunroof?

That is correct

Well which one the sun visor above your head or the sun shade for the sunroof?

The sun Shade for the sunroof. I understand the four clips but getting access to those with the sunroof open seems impossible.

You would use a cotter pin puller its 90 degree pick with a screwdriver handle with the glass in the vent position then you would push in the spring loaded clips while pushing up on the sunshade. It not that hard to do.

Ok. Sounds like it will work. Just reverse the process to re-install?

Yes reverse to reinstall you just dont have to push down while pushing the clips in reinstall.