93 Caprice Wagon window question

I have a 93 wagon and both of the rear windows are broken. They fall out/off track when they are rolled down. I think the plastic clips are broken. I saw a link on here before on how to fix this problem and the GM part # for the clips, but cant seem to find it now.
Any help would be greatly appreciated

Come on guys. I can't believe that nobody else has had this problem

Here's the link---> http://impalassforum.com/tech/interior/windowfix/index.htm I'm getting ready to do a couple windows on my '95 Roadmaster. The parts, surprisingly are still available at my local GM stealership parts dept. The plastic parts were about $4.44 each, and you need 2 per window, and you also need the clips , 5 per door panel. They sell them in a bag of 20 for around $20 - $22 . I ended up buying 8 of the plastic pieces and keeping the spares in my glovebox so if the time comes to fix the other windows, I'll have them available.

One thing I forgot to add. The link to the page is easy to print out and take with you to do the repair. I found it to be very thorough.

Thanks for the info. Just got back from the Chevy dealer with my new plastic thingies. Now its off to work so hopefully i can get my windows tinted this week. It sure is hot down here in Florida