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Does anyone know how to get at the XM unit on an '09 GMC Acadia? I can see the unit. It's located on the inside of the trunk, above the rear, driver-side tire. However, there's a large, black piece of plastic covering it. Any help or links to a detailed manual would be greatly appreciated. Thanks

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I ended up finding manuals here: http://sm.gpona.com:9001/si/home.do

Select the Acadia and then drill down through: Service Manual > Driver Information & Entertainment > Cellular, Entertainment, Navigation > Repair Instructions > Digital Radio Receiver Replacement.

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