yes i do have the nav system.the xm antenna is just to the right of the center of dash it covers a half an inch of the defroster outlet this is where i routed the antenna lead down into the radio cavity.i used 3m velcro to hold it to the dash and cut 3 of the defroster slats out so there was no need to drill holes. i'll try to take a couple of pictures but it's dark when i get home and it's also 18 degrees out.
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