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This is a New OEM GM Roof Mount Satellite Shark Fin Radio Antenna for several GM Vehicles between the years of 2015 and 2018. Note that this antenna has a smaller 5" base. 

         Part # 23447544

         Manufacture : General Motors

         Description: New Shark Fin Satellite Antenna, Chevrolet, GMC, Cadillac 2015-2018 

Fits the Following Vehicles

2015-2018 Cadillac Escalade    8 Cyl 6.2L

2014-2015 Chevrolet Silverado    6 Cyl 4.3L, 8 Cyl 5.3L, 8 Cyl 6.0L, 8 Cyl 6.0L Flex, 8 Cyl 6.2L, 8 Cyl 6.6L Diesel

2015-2018 Chevrolet Suburban    8 Cyl 5.3L, 8 Cyl 6.0L Flex

2015-2018 Chevrolet Tahoe    8 Cyl 5.3L, 8 Cyl 6.2L

2014-2015 GMC Sierra    6 Cyl 4.3L, 8 Cyl 5.3L, 8 Cyl 6.0L, 8 Cyl 6.0L Flex, 8 Cyl 6.2L, 8 Cyl 6.6L Diesel

2015-2018 GMC Yukon    8 Cyl 5.3L, 8 Cyl 6.2L

         Note: Note that this antenna has a smaller 5" base.  Measure your old one before purchasing

Please Confirm Fitment with Dealer Prior to Purchase to Ensure Part # will Fit Your Vehicle's Application