Using a Test Antenna
WARNING: This page is about a different car, the 2007 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
Use a test mast antenna to quickly check for poor vehicle antenna operation. Unplug the antenna lead-in connector from the radio receiver and plug a test antenna into the radio. Make sure the test antenna base is grounded to the vehicle chassis and keep hands off the mast. Check the radio reception in an area away from electrical interferences. Tune to several weak and strong AM and FM stations. If the radio reception improved, the problem exists with the vehicle antenna and/or lead-in cable. If the reception is still poor, refer to Audio System Troubleshooting Hints .