Just got off the phone w/ GM and the part numbers are in the catalog but they're not listed correctly (they're listed w/o any option code when they should have the option code J6E)
Front LH #20982719
Front RH #20982734
Rear LH #20982644
Rear RH #20982647
They are a bit pricey (fronts list at $625.30 & rears list at $420.60) but if anyone is interested I can offer the fronts for about $390 & the rears for about $264 (prices are for each caliper, of course, and are subject to change as time goes on and GM shifts their pricing around)
Because of your help, I now have a set of these on the way for my wagon for FREE from GM.
Part delays have been keeping my car from being repaired. The issue got excalated within GM and I got a call from the 'Executive center'. They appologized for the issues and asked if I wanted anything for the car. The calipers were the first thing that jumped into my head. I'd been looking at powder coating or painting the existing ones, but that wouldn't have had that factory look (no logo). The dealer couldn't find the part and wanted to get a normal set and powder coat them, which defeated the whole point of getting anohter set. Because of Chris' help, I'll be getting the correct part #s. I'm not sure how long it's going to take, I'm not really worried about that. I just wanted the factory look.
Can the calipers be used on a regular, non-V car? I should have a extra set of brand new (130 miles) calipers for sale soon. I may *gulp* be getting my car back next week.
Thanks again RippyPartsDept and elphil. I wouldn't be getting the right parts without your help.