The multi-band antenna is on the roof of the vehicle. The antenna is used for AM-FM radio, OnStar, the SiriusXM satellite radio service system, and GPS (Global Positioning System), if the vehicle has these features. Keep the antenna clear of obstructions for clear reception.
If the vehicle has a sunroof, and it is open, reception can also be affected.
Radio Reception
Audio PlayersCylinder Head Removal (LAF, LEA, or LUK) Engine Block Cylinder Head
Special ToolsEN 38188Cylinder Head Broken Bolt Extractor KitFor equivalent regional tools, refer toSpecial ToolsRemove the cylinder head to the block bolts insequence.Discard the bolts.Caution:In order to prevent damage to the valves and injectors duringcylinder head removal, set the cylinder head o ...