Okay, driver's side front door. A 2000 LS8. My window fell a couple days ago... That was fun! I took off the door panel and other crap. The plastic pieces that ride in the channels have a clip broken on both of them. Does anybody know what these are called or the part numbers?

Thanks in advance,
'00GrayGhost

This might help. not exactly sure what piece you are talking about.
http://www.trademotion.com/partlocator/index.cfm?action=getLocator&siteid=214270&chapter=DR2KD00&appSectionid=2732&groupid=51894&subgroupid=2531&componentid=0&make=21&model=Ls&year=2000&graphicID=KD00890&callout=1&catalogid=2

Okay, driver's side front door. A 2000 LS8. My window fell a couple days ago... That was fun! I took off the door panel and other crap. The plastic pieces that ride in the channels have a clip broken on both of them. Does anybody know what these are called or the part numbers?

Thanks in advance,
'00GrayGhost
Sounds like that's a part of the regulator assembly. I don't think they'll sell you just the clips. I just replaced mine a few weeks ago and, like you said, the plastic pieces were everywhere.