Black plate (17,1)Cadillac CTS/CTS-V Owner Manual (Include Mex) - 2012Infotainment System 7-17Backglass AntennaThe AM-FM antenna is integratedwith the rear window defogger,located in the rear window.Make sure that the inside surface ofthe rear window is not scratchedand that the lines on the glass arenot damaged. If the inside surface isdamaged, it could interfere withradio reception. For proper radioreception, the antenna connectorneeds to be properly attached to thepost on the glass.If a cellular telephone antennaneeds to be attached to the glass,make sure that the grid lines for theAM-FM antenna are not damaged.There is enough space betweenthe grid lines to attach a cellulartelephone antenna withoutinterfering with radio reception.Notice: Using a razor blade orsharp object to clear the insiderear window can damage the rearwindow antenna and/or the rearwindow defogger. Repairs wouldnot be covered by the vehiclewarranty. Do not clear the insiderear window with sharp objects.Notice: Do not apply aftermarketglass tinting with metallic film.The metallic film in some tintingmaterials will interfere with ordistort the incoming radioreception. Any damage caused toyour backglass antenna due tometallic tinting materials will notbe covered by the vehiclewarranty.Multi-Band AntennaThe antenna located on the roof ofthe vehicle is used for the OnStar,XM Satellite Radio Service System,and GPS (Global PositioningSystem), if the vehicle has thesefeatures. Keep the antenna clear ofobstructions for clear reception.If the vehicle has a sunroof and it isopen, the performance of OnStar,XM, and GPS can be affected.