Part Number for Antenna?
Are you talking about the base + mast at the rear of the roof?
If that's the case, I have my old one (does not support XM) for sale.
It's the base that controls all of the different functions and is car specific as they contain different features and different FAKRA cable connectors. The masts are all the same.
I don't have a part number nor could I find the correct one. You could call a dealership and inquire. Alternatively, an eBay search for "GM Mast" or "OnStar Mast" would work.
We have the round bottom:

Notice the base in that picture. While it may look the same, the connector is different than what we use. I know you don't need one. I'm just pointing it out to show you that the masts are interchangeable. FYI: Our base has three separate cables with three FAKRA [color] connectors: Blue, Yellow/"Curry" (XM), and Violet. Two cables if not XM equipped.
I have a little metal nub on top, which is what I assume the mast sits on. Which is not really what your bottom looks to match up to so I am a little more confused.
I'll check my old one in my trunk and get back to you.


