Axxess GMOS-LAN-012 GM Wiring Interface

Connect a new car stereo and retain the GM satellite radio, OnStar®, and factory safety warning chimes in select 2006-up GM vehicles

Item #: 120GMOSL12

In Stock

3 Reviews

Your price: $169.99 Earn up to 170 Rewards points

Add to Cart Free Shipping Lifetime Tech Support

+ Add to wishlist + Email me alerts for this product

View all associated offers




Does it fit my car?

Select your car

Find what fits your car


The Axxess GMOS-LAN-012 radio replacement interface lets you replace the factory radio in select 2006-up GM vehicles, and keep your factory-installed OnStar system, satellite radio tuner, and door chimes. Even if you don't subscribe to OnStar, you'll need this interface to connect an aftermarket stereo.

Connect the GMOS-LAN-012 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. You can adjust volume settings for OnStar as well as the safety chimes. This interface 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 General Motors 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: Your vehicle must have factory-installed steering wheel controls in order to control the GM satellite radio tuner after installation.

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

Hands-on research

What's in the box?

Download owner's manual

  • GMLAN29 Data OnStar/Satellite Radio/Chime Retention interface module
  • GMLAN29 factory radio harness
  • Antenna adapter cable (AD-CR1)
  • 16-pin to composite video back-up camera harness
  • Installation Instructions

Product Research


Overview: The GMOS-LAN-012 is designed to retain OnStar, OEM Satellite Radio, and the warning chimes that are normally lost when a factory GMLAN29 radio is removed and provide a 12 volt accessory output for aftermarket radio operation. The GMOS-LAN-012 also provides a Mute, Parking Brake, VSS (Vehicle Speed Sensor), and a Reverse output to make installing an aftermarket navigation radio simple and less time consuming.

GM Vehicle Compatibility: The GMOS-LAN-012 is compatible with the following 2006-up GM vehicles (as of 2/28/2012):

Make Model Year
Enclave 2007-2011
Lucerne 2006-2011
Cadillac SRX 2007-2009
Escalade 2007-2011
DTS 2006-2010
Chevrolet Avalanche 2007-2011
Equinox 2007-2009
Express 2008-2011
Impala 2006-2011
Monte Carlo 2006-2007
Silverado 2007-2011
Suburban 2007-2010
Tahoe 2007-2011
Traverse 2009-2011
GMC Acadia 2007-2011
Savanna 2008-2011
Sierra 2007-2011
Yukon 2007-2011
Hummer H2 2008-2009
Torrent 2007-2009
Vibe 2009
Outlook 2007-2009
Vue 2008-2009
Suzuki XL-7 2007-2009

Note: Please consult Crutchfield's Outfit My Car to see if your vehicle is compatible and what additional accessories will be needed.

Backup Camera Harness: This harness is used when you are trying to retain the factory backup camera in your GM vehicle. The backup harness is fitted with a 16-pin GMLAN29 connector on one end and a male composite video RCA connector on the other end.

OEM Steering Wheel Control Compatible (optional): The GMOS-LAN-012 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).

Note: The GM vehicle must have factory steering wheel controls to retain access to the factory customization menu, once the factory radio is replaced with an aftermarket head unit that also support steering wheel control.

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.

Axxess GMOS-LAN-012 GM Wiring Interface Reviews

Average Customer Review:

3 reviews
Review this product
Great Gear Giveaway

Submit a review and then enter to win a $350 rewards card


Review this product:

Thanks for taking the time to share your experiences about this product. Please be sure to focus your comments on the product itself. Read our Review Guidelines for more information.

Your email won't be visible. Please use the email address that is associated with your order.
(e.g., JohnD) Your review will be signed using the display name and location
(e.g., Charlottesville, VA)

Click on a star to rate the overall product on a scale of 1-5
1500 characters left
  Attach a YouTube Review
Crutchfield Video Review Guidelines
  • Only submit videos that you made or are authorized to use.
  • Do not submit videos that contain music, video or visuals that are copyrighted and belong to someone else.
  • Please see our Review Guidelines for more information.
500 characters left
500 characters left

axxess GMOS-LAN 012

Written By rodneyfe, Chicago Illinois on Sunday, February 01, 2015

Crutchfield Customer Review (What's this?)

After dealing with best buy and getting the wrong product twice choose Crutchfield and I couldn't be happier the harness works perfectly now everything on my aftermarket radio works thanks for all your help you have a customer for life

Pros: Does everything it says it would

Cons: No cons

Axxess GMOS-LAN-012 GM Wiring Interface

Written By Derek, Rochester, NY on Tuesday, September 23, 2014

Crutchfield Customer Review (What's this?)

It works perfectly! Thanks Crutchfield

Meets expectations.... mostly.

Written By Jesse, Springfield, MO on Saturday, May 24, 2014

Crutchfield Customer Review (What's this?)

Overall, this harness was simple and straight forward to install. I haven't installed a stereo in 15 years, so I was a little worried going into it. The connections are straightforward and the manual was useful. I did call Crutchfield for a few questions, but they were mostly due to my inexperience and not wanting to make a mistake. I also love the way this thing integrates with the ASWC-1. By the time you are done, you have quite a bundle of a harness to fit behind your dash, but I was able to make it work. My biggest beef, and reason for docking a star, is that my factory XM tuner does not work as advertised. I have a 2006 Cadillac DTS, and was originally told this sucker would display XM on my driver information panel. The manual says this also, and that I can even change channels using the steering wheel controls. Well, I CAN listen to XM if I switch to AUX, but I have no visibility on my info panel, and can not change the station. Luckily, it was already set to the station I listen to 75% of the time. After calling Tech Support, I was basically told that factory integration of the XM tuner is dicey, and for full functionality I should just purchase an aftermarket tuner. Fortunately, I only paid half price for this harness as part of a bundle, or I would have been much more disappointed with this shortcoming.

Pros: Overall pretty easy to install. Integrates great with an ASWC-1.

Cons: Factory XM integration did not deliver as advertised.

Searches related to the Axxess GMOS-LAN-012 GM Wiring Interface Connect a new car stereo and retain the GM satellite radio, OnStar®, and factory safety warning chimes in select 2006-up GM vehicles