Quote:
Originally Posted by f5fstop
Not all of the warts GM uses for antennas have all the leads. If you have the wart with the little dingy antenna on top, most likely there is an XM lead (and the dealer should have known). Possibly there was no lead.
The little wart on the tri-mode antenna contains the XM and the Onstar GPS, and the little antenna sticking up from the wart is the cell antenna for Onstar.
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Thanks F5
Here's a Pic I took to night..excuse the color crappy camera..good one out for repair..
I guess this is what you mean... has the base..
Also now the alternator whine is back,

. I stopped for pizza..shut the rig down...and when restarted the whine showed up again only on XM..WTF is wrong. now.