AntennaX The Shorty (5-inch) Antenna for GMC Sierra 3500 GM fits 1985 thru 2018 GMC Sierra 3500 Replace your ugly factory (31 inch) metal shaft antenna with this stylish yet functional LOW PROFILE (5 inch) black powdercoated billet aluminum 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 4 out of 5 reception with most people noticing no difference at all. As a general rule, strong stations will be fine and weak stations will be reduced Does not affect On-Star, Bluetooth, GPS Navigation, or Sirius XM radio as those Satellite services use a separate antenna in your vehicle