How do you remove tha headlight assemblies on a 06 Buick rondevous

I had an '05 and I recall that each headlight has 2 plastic pulls (straight up) and they unlock the entire assembly for removal.....then you reinstall the assembly and push down the pulls and they lock it in place.

What about the screw in the lower corner by the grill? How do you get to that?

Don't think that has anything to do with removing the headlights. Try doing a google search and maybe someone has a video that will help you