FITS THE FOLLOWING VEHICLES: 
CHEVROLET
Colorado  2015-2018
Silverado 1500  2014-2018
Silverado 2500  2015-2019
Silverado 3500  2015-2019
Silverado Classic  2016-2019
Suburban  2015-2019
Tahoe  2015-2019
GMC                
Canyon  2015-2019
Sierra 1500  2014-2018
Sierra 2500  2015-2019
Sierra 3500  2015-2019
Sierra Classic  2019
Yukon      2015-2019
Yukon XL  2015-2019                           
FOR SPECIFIC VEHICLE LIST CLICK HERE
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iDatalink HRN-RR-GM3 Interface Harness
Connect an iDatalink-compatible car stereo and retain steering wheel controls, OnStar, backup cam, and Bluetooth in select 2014-up GM-made vehicles 
GENERAL FEATURES:
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
warranty: 1 yeariDatalink working with GM
iDatalink's HRN-RR-GM3 interface harness allows you to connect an iDatalink-ready car stereo in select 2014-up GM-made vehicles, working in conjunction with iDatalink's Maestro ADS-MRR module. Once connected, you'll retain the use of your steering wheel audio controls, your OnStar® system with its Bluetooth® capability, your factory backup camera, and your warning chimes. Plus, you'll be able to assign secondary functions to your steering wheel audio controls.
Keep in touch with your truck
You'll be able to set up gauges on your receiver's screen to monitor engine performance, tire pressure, and other functions. In addition, you will retain full access to your factory vehicle customization options on your new radio's screen.
Installation
The package includes connectors that plug in between the Maestro module, your vehicle's radio's wiring plugs, and your new car stereo. You'll have to solder or splice together this harness's power/ground, illumination, speaker, and navigation output wires to the corresponding wires on your aftermarket receiver's wiring harness.
Satellite radio note:  Your satellite radio tuner is built into your factory radio, so this harness can't retain that feature. To keep SiriusXM working, you'll need a satellite radio tuner and an adapter to connect your vehicle's satellite radio antenna to that tuner.
Installation Note: The HRN-RR-GM3 harness must be used with the iDatalink Maestro ADS-MRR module to connect a new iDatalink-compatible car stereo to your GM vehicle.