Antenna Adapter That Connects from an aftermarket Antenna or FM Modulator to The OEM Factory Radio from a Chevrolet, HHR, 2006, 2007, 2008, 2009, 2010, 2011 Antenna adapter for the factory radio from a CHEVROLET HHR 2006, 2007, 2008, 2009, 2010, 2011. If you want to repurpose your cars factory radio in your RV, workbench, or golfcart you will need this adapter to connect to an aftermarket antenna CarXtc antenna adapter plugs directly into the factory radio pulled from a HHR . Plugs directly into your vehicle original radio. Antenna adapter is needed for your CHEVROLET HHR 06, 07, 08, 09, 10, 11 If installing an FM modulator you will need this and the standard aftermarket antenna adapter