B01K05B3KU Maestro HRN-RR-GM3 Plug and Play T-Harness for GM3 Vehicles, with Speaker

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)

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