Axxess GMOS-LAN-02 Wiring Interface

Connect a new car stereo and retain factory amp, OnStar, Bluetooth, backup cam, and warning chimes in select 2006-up GM vehicles

Item #: 120OSLAN02

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13 Reviews

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The Axxess GMOS-LAN-02 GM radio replacement interface lets you replace the factory radio in select OnStar® equipped 2006-up General Motors vehicles using the existing wiring and connectors. Even if you don't subscribe to OnStar, you'll need this interface to connect an aftermarket stereo.

Connect the GMOS-LAN-02 to your aftermarket radio, mount the module, and plug it into the existing factory plug. Get the great sound you want, and keep all of the important safety features intact, including your factory Bluetooth and your GM backup camera. And you can adjust volume settings for OnStar as well as the safety chimes. In addition, this harness lets your new receiver work with any existing factory amplifiers.

Also, once you turn off the ignition in these GM vehicles, the radio continues to play until you open the door. This interface maintains that function with your new aftermarket radio. This adapter gives you convenient plug-in connections for the Axxess steering wheel control adapter (not included) that works with most aftermarket stereos – that means less wiring work for you.

This interface is compatible with select 2006-and up GM vehicles. If you haven't done so already, please enter your vehicle information or call an Advisor at 1-888-955-6000 to find out if this item is compatible with your vehicle. Warranty: 1 year.

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.

Axxess GMOS-LAN-02 Wiring Interface Reviews

Average Customer Review:

13 reviews
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Written By John C., Oregon on Sunday, November 01, 2015

Crutchfield Customer Review (What's this?)

Installed this in my 2013 Impala LTZ. Worked exactly as advertised. Really made the install a breeze. Allowed me to adjust the gain to the Bose amp, a definite plus, and i was able to tone down the warning chimes to almost inaudible. All in all, a great product.

Pros: Easy to wire up, adjustable amp gain and chime volume.

Cons: None.

Axxess GMOS-LAN-02 Wiring Interface

Written By Lurker J, Kansas on Thursday, October 22, 2015

Crutchfield Customer Review (What's this?)

Fairly easy to install. No complaints, it works fine.

Pros: easy to install

Cons: none

Great product

Written By Tom M., Kansas on Sunday, October 11, 2015

Crutchfield Customer Review (What's this?)

It's really nice to have a product that can help you retain all your factory options

Works great

Written By Tony, South Dakota on Sunday, September 27, 2015

Crutchfield Customer Review (What's this?)

Installation was easy. Works as advertised.

Pros: Directions were easy to understand. Did it's job.

Cons: None

Works Great

Written By FastGTP05, Virginia on Tuesday, April 14, 2015

Crutchfield Customer Review (What's this?)

Works great easy to install and retains all factory features including backup camera, rear dvd screen, onstar, & factory cell phone

Pros: Easy to install! Works Great!

wiring interface to retain OnStar

Written By Sabra, Dallas, TX on Friday, August 22, 2014

Crutchfield Customer Review (What's this?)

This would have been 5 star, but had problems with some kind of faulty wiring in harness that connects to the steering wheel interface adapter. Couldnt figure out why my steering wheel controls wouldnt work, then a call to Crutchfield Tech support really helped. hey, Im a 53 yr old mom with 2 kids. I was able to install this myself and get my new car stereo w bluetooth playing. Had to make some hardwiring adaptions, but it works great now. It is a great feeling!! Yeah Tech Support!!!

Easy Install

Written By Jay H, Brighton, MI on Monday, November 25, 2013

Crutchfield Customer Review (What's this?)

Module and wiring harness very easy to install.

Axxess GMOS-LAN-02 Wiring Interface

Written By JonahH, Heflin, AL on Sunday, July 07, 2013

Crutchfield Customer Review (What's this?)

very good integration. not exactly simple to install but with crutchfields excellent tech support, its a snap. would definitely rate this a 4 hammer install job.

Axxess GMOS-LAN-02 Wiring Interface

Written By Que, Las Vegas on Saturday, May 26, 2012

Crutchfield Customer Review (What's this?)

It's what you need to replace your factory radio if you want to retain the on star functions with a after market radio

Pros: It gets the Job done perfectly

Cons: This price is a little High

Go with the PAC model instead

Written By chris9510, St Louis on Tuesday, May 04, 2010

Crutchfield Customer Review (What's this?)

like many other reviewers, I too was recommended this kit. This kit works, don't get us
wrong, but if you have a factory LCD/DVD forget the wireless headphones. The control
module is huge and hard to hide inside the dash.

Bought the PAC GMRVD to retain factory LCD, rear seat controls, and IR (wireless
headphones), but needs the PAC OS-3/OS-3BOSE or better to make the IR work.
Bought the PAC OS-4 since the 3 series were discontinued. Much smaller than the
Axxess, fixed IR issues, better chime system, easier to tuck into the dash, better all
around. PAC model also comes with pre-wired harness for a steering wheel controls
like the SWI-PS!!

Stay away from this if you have a factory LCD and want to retain its function,
otherwise it works as advertised.

Needs a major improvement

Written By Kerry, Ft Worth, TX on Monday, March 23, 2009

Crutchfield Customer Review (What's this?)

My installation: 2008 Silverado, Kenwood DNX-5120, factory Bose amp.
(Truck came with standard MP3 radio, no nav.)

Swapped this out for a PAC OS-4

While the GMOS-LAN-02 DID work, it had two major flaws.

1. The steering wheel controls do not operate the Onstar.

2. The dealbreaker is that even though the unit includes a mute wire
and the DNX5120 has a mute function, using the Onstar kills power to the
radio instead of simply muting or pausing the audio. While this may be OK
for a regular radio, I find it unacceptable for a navigation unit with its
longer bootup time. There is a workaround involving splicing in a 10k
resistor between the brown mute and the red switched power wires, but
this causes the DNX5120 to be in "attenuate" mode whenever the truck is

Minor quibbles:

1. I did not like that when you initiate a call with the Onstar, the Metra
takes long enough to switch over that the "Onstar Ready" prompt is not
heard. It's actually ready, you just have to assume and proceed with the

2. The turn signals sound like someone tapping a fingernail on the
windshield, not nearly as nice as the factory sound or the replacement.

Not Best Suited for 2007 Suburban

Written By George, Miami, FL on Monday, November 03, 2008

Crutchfield Customer Review (What's this?)

This product was suggested for the 2007 Suburban but it looses the functionality of the rear seat entertainment system. This includes the controls of the rear center console, rear video, and rear IR-headphones.

The solution was the PAC OS-3Bose, sent to me as a replacement by Crutchfield, and everything works like a charm. All rear controls work, as well as the video-audio in, IR-headphones, and Video. The OS-3Bose has to be used in conjunction with the PAC GMRVD and PAC SWI-JACK.

BTW, I replaced the original head unit with the Kenwood DDX712.

A surprising help

Written By Matthew, Michigan on Wednesday, September 10, 2008

Crutchfield Customer Review (What's this?)

When Crutchfield first recommended The GM Adapter to keep my door ajar chimes and blinker clicking sounds, I thought, "that's a lot of money for a couple of cheesy warning noises", and was not going to get it. But they said it also had some other hookups and kept the OnStar option, so I reluctantly ponied up the money. Boy, was I glad I did. It made hooking up my Pioneer harness to my Chevy Impala 1000% easier. It had all the hookups right there: Parking brake, back up lights, VSS, illumination, ground, power and RCA's for all speakers and amps. No long leads back to the trunk! No splicing into wires! No bad grounds! And now, all the chimes and buzzers have an adjustable volume, too. It made it so much more of a professional install.

Hands-on research

What's in the box?

Download owner's manual

  • GMOS-LAN-02 Module
  • Vehicle harness
  • 16-pin to stripped leads harness
  • Composite video harness
  • Antenna adapter
  • Installation Instructions

Product Research


GMOS-LAN-02 Radio Replacement Interface: The GMOS-LAN-02 radio replacement interface module allows the replacement of the factory radio in your 2006-up GM LAN 29 amplified vehicle with an aftermarket head unit. This interface module allows you to retain factory features such as OnStar, Bluetooth, steering wheel control (optional interface required), and warning chimes. The interface module also provides data bus driven outputs such as retained accessory power (RAP), vehicle speed sensor (VSS), illumination, reverse trigger, and parking brake.

  • Retained Accessory Power (R.A.P.): The ignition power source of most GM vehicles keeps the radio on until one of the doors is opened. This feature is called the R.A.P. (retained accessory power). The GMOS-LAN-02 is designed to retain this feature.
  • OnStar Compatible: The GMOS-LAN-02 is designed to retain the factory OnStar emergency services system that would normally be lost when your factory radio is replaced by an aftermarket head unit.
  • Bluetooth: The GMOS-LAN-02 radio replacement interface module retains your factory Bluetooth functionality.
  • Warning Chimes: The GMOS-LAN-02 OEM integration kit retains your vehicle's factory warning chimes.
  • Backup Camera: The GMOS-LAN-02 includes a composite video harness which allows you to retain your vehicle's factory backup camera.
  • OEM Steering Wheel Control Compatible (optional): The GMOS-LAN-02 features a right-angle 3.5mm connector that lets you keep your GM vehicle's OEM steering wheel controls via the optional Axxess Steering Wheel Control Interface (120ASWC1, sold separately).

Vehicle Compatibility: The GMOS-LAN-02 is compatible with select 2006-up GM LAN 29 vehicles that feature a factory amplified sound system (as of 9/30/2013).

Make Model Year
Buick Enclave 2007-up
Lucerne 2006-up
Cadillac Escalade 2007-up
DTS 2006-2010
SRX 2007-2009
Chevrolet Avalanche 2007-up
Equinox 2007-2009
Express 2008-up
Impala 2006-up
Monte Carlo 2006-2007
Silverado 2007-up
Suburban 2007-up
Tahoe 2007-up
Traverse 2009-up
GMC Acadia 2007-up
Savana 2008-up
Sierra 2007-up
Yukon 2007-up
Pontiac Torrent 2007-2009
Vibe 2009
Saturn Outlook 2007-2009
Vue 2008-2009
Suzuki XL-7 2007-2008
Note: Please consult the Crutchfield Car Selector to see if your vehicle is compatible.

Adjustable Volume for Chimes/OnStar: The GMOS-LAN-02 interface features potentiometer located on the 10 pin harness of the module, to adjust the chime/OnStar volume of your vehicle. Rotate clockwise to make the chime/OnStar louder and counterclockwise to make the chime/OnStar softer.

Connections: The GMOS-LAN-02 consists of a single interface module with a 18-pin connector on one end and a 16-pin connector on the other end. It also includes three harnesses and an antenna adapter. One harness includes a 16-pin plug that plugs into the 16-pin connection on the interface and its bare lead wires are hardwired into your new radio's harness. The other harness includes a 18-pin plug that plugs into the 18-pin connection of the interface and includes GM factory plugs that plug into the factory side plugs behind the radio. It also includes bare power/ground wires that will need to be hardwired into your new radio's harness. In addition there is a composite video harness to retain your vehicle's factory backup camera.

Aftermarket Radio Connection: The GMOS-LAN-02 features the following hardwire connections to your aftermarket head unit and factory system.

Wire Color Function
Yellow +12 Volt Constant
Black Ground
Red +12 Volt Accessory
Blue/white Amp Turn-On
Orange/white Illumination Output (+)
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 -
Purple Right Rear Speaker +
Purple/black Right Rear Speaker -
Light Green Parking Brake
Green/purple Reverse Output (+)
Blue/pink VSS (vehicle speed sense)
Brown Mute

Optional RSE Retention Harness: The Metra GMRSAV and GMRSAV2 (item numbers 120GMRSAV and 120GMRSAV2, both sold separately) are RSE retention harnesses designed to retain the rear seat entertainment system in select GM vehicles. The harnesses provide an audio/video signal for the factory overhead video screen from your new aftermarket radio, and provide the audio/video output from the rear seat control panel to the aftermarket head unit.

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.

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