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iDatalink Connec ADS-HRN(SR)-GMS05 Factory Integration Adapter

Connect a new car stereo and retain your factory steering wheel audio controls, OnStar®, and amp in select 2006-up GM vehicles

Item #: 794HRNGMS5

6 Reviews | 1 question - 1 answer

This item is no longer available.

Original Price: $34.99

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This iDatalink ADS-HRN(SR)-GMS05 wiring adapter from iDatalink allows you to connect a new car stereo in select 2006-up GM 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 factory amp, safety warning chimes, and OnStar, if present.

The package includes connectors that plug in between the Maestro module, your GM 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.

Installation note: This adapter must be used with the iDatalink Maestro ADS-MRR module to connect a new car stereo to your GM vehicle.

Note: Most vehicles will require additional installation parts — please identify your vehicle if you haven’t done so. You can also call an Advisor for more information.

Product Highlights:

  • works with Maestro ADS-MRR module to allow installation of new receiver in select GM vehicles
  • retains the use of your steering wheel audio controls, OnStar, safety warning chimes, and your factory amp
  • warranty: 1 year
  • Our 60-day money-back guarantee

iDatalink Connec ADS-HRN(SR)-GMS05 Factory Integration Adapter Reviews

Average Customer Review:

6 Reviews

Easy to install

Written by: Todd from TX on June 30, 2014

Crutchfield Customer Review (What's this?)

Very easy to install and directions are pretty straight forward.

Pros: Easy to hookup

Cons: So many wires makes it hard to cram behind radio. When I switch over to using RCA instead of speaker wire that will clean up a lot.

Great product

Written by: Jeremy C from Tullos, LA on May 10, 2014

2008 Chevrolet Silverado
Crutchfield Customer Review (What's this?)

First thing is you also have to have the maestro box too. I thought you only needed this but ended up having to wait on the box. It's all color to color wiring which is pretty easy. Don't get intimidated looking at all the wires it's not that bad. Over all good product.

Pros: Colors matched with radio wires good, made the maestro box installation easier.

Cons: Didn't know I had to have the maestro box too (sold separately). Instructions are online.

idatalink factory harness adapter

Written by: Trent from WTH, IN on May 9, 2014

2008 GMC Sierra
Crutchfield Customer Review (What's this?)

Basic pug and play with a few wiring bits.

Pros: Maintained factory plugs

Cons: none

2007 Chevy Equinox

Written by: 04dawg from Olive Branch, MS on February 11, 2014

Crutchfield Customer Review (What's this?)

Easy, easy, easy...unless you're color-blind. :)

Pros: Color coded perfectly.

Cons: Needed to put a resistor in-line for proper control of the stereo (unit kept changing sources without anything being touched - Pioneer FX-H700BT). Easy fix, but just annoying. Crutchfield's tech support was great and was all over it.

maestro rr gm harness for 2011 2500HD

Written by: mike from Luling, LA on January 24, 2014

2011 Chevrolet Silverado 2500/3500
Crutchfield Customer Review (What's this?)

Ok the instructions don't come with it... so have your phone with adobe handy. Also if you have a factory amplifier, there is a modification that must be completed to the harness so that the chimes work, this would be fine as it's not that hard to do BUT there is no mention of it anywhere. I had to listen to aweful chimes for 2 weeks before I recieved a PDF file which showed the modification. Crutchfield also advised me to disconnect the "amp on" wire, stating that this function is controlled by the data cable... wrong, with that cable disconnected I got a very loud buzzing noise when the chimes were supposed to sound. I'm not knocking Crutchfield for this as they were very courteous and even called me a couple of times with different things to try unexpectedly. This is on the manufacturer, the PDF I recieved said that the modification had to be completed on all GM vehicles with a factory amplifier, you would think they would post it on the site, in the install file, or at least send it to their dealers (Crutchfield) so they could assist their customers. Once all was fixed it worked pretty good, the static and distortion in the chimes still come around sometimes but it's not as bad or as often.



cd player

Written by: Mike from jber, ak on December 22, 2013

2011 Chevrolet Traverse
Crutchfield Customer Review (What's this?)


Pros: Excellent


Hands-on research

What's in the box?

Download owner's manual

  • 16" GM vehicle harness (for use with Maestro RR interface)
  • 17" RCA harness

Product Research


Overview: The iDatalink Maestro ADS-HRN(SR)-GMS05 installation harness greatly simplifies the installation of the Maestro RR Car Radio Replacement Interface module (794ADSMRR, sold separately) in select GM vehicles.

Vehicle Compatibility: The iDatalink Maestro ADS-HRN(SR)-GMS05 installation harness is compatible with the following GM vehicles (as of 9/5/2013):

Make Model Year Vehicle Specific Cable
Buick Enclave 2008-2013 ADS-HRN(SR)-GMS05
Lucerne 2006-2012 ADS-HRN(SR)-GMS05
Cadillac DTS 2006-2012 ADS-HRN(SR)-GMS05
Escalade (except 2013 w/ NAV) 2007-2013 ADS-HRN(SR)-GMS05
Chevrolet Avalanche (except 2013 w/ NAV) 2007-2013 ADS-HRN(SR)-GMS05
Equinox 2007-2009 ADS-HRN(SR)-GMS05
Express 2008-2013 ADS-HRN(SR)-GMS05
Impala 2006-2013 ADS-HRN(SR)-GMS05
Monte Carlo 2006-2007 ADS-HRN(SR)-GMS05
Silverado (except 2013 w/ NAV) 2007-2013 ADS-HRN(SR)-GMS05
Suburban (except 2013 w/ NAV) 2007-2013 ADS-HRN(SR)-GMS05
Tahoe (except 2013 w/ NAV) 2007-2013 ADS-HRN(SR)-GMS05
Traverse 2009-2013 ADS-HRN(SR)-GMS05
GMC Acacia 2007-2013 ADS-HRN(SR)-GMS05
Savanna 2008-2013 ADS-HRN(SR)-GMS05
Sierra (except 2013 w/ NAV) 2007-2013 ADS-HRN(SR)-GMS05
Yukon/XL (except 2013 w/ NAV) 2007-2013 ADS-HRN(SR)-GMS05
Hummer H2 2008-2009 ADS-HRN(SR)-GMS05
Saturn Outlook 2007-2010 ADS-HRN(SR)-GMS05
Note: Please consult Crutchfield's Outfit My Car to see if your vehicle is compatible and what additional accessories will be needed.

Connections: The iDatalink Maestro ADS-HRN(SR)-GMS05 installation harness contains three Molex connectors which plug into your GM factory radio harness. On the other end of the harness are five multi-pin connectors which plug into the Maestro RR Car Radio Replacement Interface module (794ADSMRR, sold separately). There is also a left/front-channel RCA output connector, center-channel RCA output connector, mono-sub RCA output connector, and back-up camera RCA output which plug into the corresponding jacks on your aftermarket head unit. In addition, you will need to hardwire the power/ground, illumination, speaker, and navigation output leads of the ADS-HRN(SR)-GMS05 harness to your aftermarket head unit's wiring harness.

Note: When using the ADS-HRN(SR)-GMS05 installation harness, you will not use the additional harnesses that are included with the Maestro RR Car Radio Replacement Interface module (794ADSMRR, sold separately).

Wire Code Chart:

Wire Color Function
Red +12 Volt Accessory
Yellow +12 Volt Constant
Black Ground
Blue/White Amp Turn-On
Orange Illumination
White Left Front Speaker +
White/Black Left Front Speaker -
Gray Right Front Speaker +
Gray/Black Right Front Speaker -
Green Left Rear Speaker +
Green/Black Left Rear Speaker -
Violet Right Rear Speaker +
Violet/Black Right Rear Speaker -
Brown Telephone Mute
Pink VSS
Violet/White Reverse Gear
Light Green Parking Brake
Yellow/black Foot Brake

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team. They verify what’s in the box, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.

Customer Q&A

1 question already asked

One end of this harness has oem plugs but the other end has a small plug that connects to the maestro box. The radio connection s are made to a separate harness that plugs into maesto box. I don't remember if the colors from the oem plugged harness matched the radio connection colors. If so, in theory, you could cut the little plug off and wire it to radio. I personally wouldn't take the gamble. Either get the maestro or buy a different harness. Hope this helps. Good luck. [ Michael  Apr 17, 2014 ]