XM receiver is above the glove box. The current shark fin antenna used on the H3, is used for Xm signal and Onstar GPS, and the little antenna that screws into this shark fin antenna is the onstar phone antenna.
Per info I received, this antenna is supposed to be capable of being used with a nav unit. However, per the schematics and info I have found on the H3, the nav unit will have a separate antenna mounted under the top of the I/P.
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Black Sheep Hummer Squadron
(ME TOO)
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