Removing the Roof Rack...

I have a 96 Tahoe and i am wanting to remove the roof rack, and i just have a couple of questions (or maybe just one)
If i remove the roof rack, do i need to replace the holes with caps of any kind, and if i do, does anyone know where i can buy them??

i think i remember seeing something about this on a cardomains.com webpage for someone with a tahoe, but i can remember the site for the life of me...

just wonderin if anyone could help me..

Thanks!