AntennaX Off-Road (13-inch) Antenna for Chevy TrailBlazer GM fits 2007 thru 2008 Chevy TrailBlazer Replace your ugly factory (31 inch) metal shaft antenna with this stylish yet functional LOW PROFILE (13 inch) flexible rubber antenna PLUG-N-PLAY installation, which means it screws onto your existing antenna mount (a direct bolt-on part, no wiring involved) and takes a minute to do 99.9% of the time reception stays the same OR improves Does not affect On-Star, Bluetooth, GPS Navigation, or Sirius XM radio as those Satellite services use a separate antenna in your vehicle