Well, I just went to gmpartsgiant.com and was able to see this picture:
http://genmotorinfo.com/Picture.aspx...9609122W07-011
It looks like they are RETAINER,FRT BPR FASCIA CTR SUPT(BLACK)(6.3MM DIA X 23MM)(1.276) Replaced by:
**589290
You can search the site and verify.