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iDatalink HRN-HRR-GM3 harness and ADS-MRR module in plastic housing

iDatalink

iDatalink HRN-HRR-GM3 Radio Replacement Harness with ADS-MRR Module

SKU CH-GW2K-GJSPS

Radio replacement harness for 2014+ GM vehicles retaining steering wheel controls, warning chimes, OnStar, backup camera and vehicle settings when paired with a Maestro ADS-MRR or ADS-MRR2 module

  • Product typeHarness
  • Key featuresRequires Maestro ADS-MRR or ADS-MRR2 module for full functio
  • Retains steering wheel controls and factory chimes for safer driving
  • Maintains OnStar with Bluetooth for continued connectivity
  • Preserves factory backup camera to keep parking assist working
  • Keeps vehicle customization settings intact for personalised experience
  • Displays real-time engine data on compatible touchscreens for monitoring

GM Radio Replacement Harness 2014+

The iDatalink HRN-HRR-GM3 is a vehicle-specific installation harness that lets you install an aftermarket head unit in select GM vehicles from 2014 onward. It bundles the required ADS-MRR interface module so steering wheel controls, factory warning chimes, OnStar with Bluetooth, and the original backup camera all remain operational. Vehicle customisation settings are also preserved, and compatible touchscreens can display real-time engine performance data.

Installers Retaining Factory Features

This kit suits anyone upgrading a 2014-or-newer GM stereo while keeping steering-wheel buttons, chimes, OnStar, and the backup camera. It is not for owners of pre-2014 GM models or vehicles from other brands such as Chrysler, Fiat, Ford, Honda, Subaru, Toyota, or VW, even though the ADS-MRR module itself supports those makes with their own harnesses. Builders who want to keep the factory amplifier should also look elsewhere, because this harness requires the amplifier to be bypassed.

Requires ADS-MRR or ADS-MRR2 Module

The single specification that decides fitment is the mandatory Maestro ADS-MRR or ADS-MRR2 module; without it the harness cannot communicate with the vehicle data bus and none of the retained features will function. The module is included in this package, but the harness itself is only validated for select GM vehicles from 2014, so confirming the exact model year and trim before purchase is essential.

How it compares

Measured against everything we stock in Car Stereos & Multimedia Receivers, at today’s prices. Recalculated every night.

Price $244.99
Pricier than about 77% of the 3,253 comparable items (median $212.99).

Specifications

Product
Brand nameiDatalink
Product typeHarness

Questions about this item

Does the iDatalink HRN-HRR-GM3 harness include the Maestro ADS-MRR module or must it be purchased separately?

The harness ships with the ADS-MRR interface module included in the box.

Which Maestro module version works with the HRN-HRR-GM3 — ADS-MRR or ADS-MRR2?

Both the ADS-MRR and the newer ADS-MRR2 modules are compatible with this harness.

Will the harness keep my 2014 GM vehicle's steering wheel controls and backup camera working after the radio swap?

Yes, it retains steering wheel controls, factory warning chimes, OnStar with Bluetooth and the original backup camera.

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