AntennaX The Shorty (12-inch) Black Antenna for GMC Sierra 2500 GM fits 1985 thru 2019 GMC Sierra 2500 Replace your ugly factory (31-inch) metal shaft antenna with this stylish yet functional LOW PROFILE (12-inch) black powder coated 1/4 inch thick 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. We have 2 colors and 5 sizes from 6-inches up to 21-inches