GM3 Plug and Play T-Harness for GM3 Vehicles, With Speaker. Allows installation of a new car stereo in select Fiat vehicles (also requires the Maestro ADS-MRR module).

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GM3 Plug and Play T-Harness for GM3 Vehicles, With Speaker. Allows installation of a new car stereo in select Fiat vehicles (also requires the Maestro ADS-MRR module).

  • Connect an iDatalink-compatible car stereo and retain steering wheel controls, OnStar, backup cam, and Bluetooth in select 2014-up GM-made vehicles
  • Allows installation of a new receiver with an iDatalink port in select GM vehicles (also requires the Maestro ADS-MRR module)
  • Retains the use of your steering wheel audio controls and warning chimes
  • Retains OnStar (with Bluetooth), factory backup cam, vehicle customization options
  • displays engine performance data on touchscreen

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