AntennaX Black Billet (14-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 (14-inch) black powder coated stainless steel 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