Axxess GMOS-LAN-01 Wiring Interface

Connect a new car stereo and retain OnStar®, the safety warning chimes, the factory backup camera (with a video receiver) in select GM vehicles

Item #: 120OSLAN01

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89 Reviews

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Metra's GMOS-LAN-01 wiring interface lets you replace the factory radio in select OnStar-equipped 2006-up GM 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.

Hook the GMOS-LAN-01 to your aftermarket radio, mount the module, and plug it into the existing factory plug. Get the great sound you want, and keep all important safety features intact. And you can adjust volume settings for OnStar as well as the safety chimes.

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 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 GMC and Chevrolet 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: The GMOS-LAN-01 will not work with Bose systems.

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

  • GMOS-LAN-01 Module
  • 16-Pin harness with stripped leads
  • 18-Pin to 30-pin GM harness
  • Back-up cam harness
  • AD-CR1 Antenna adapter
  • Installation Instructions

Product Research


Overview: When replacing your factory radio, the Metra GMOS-LAN-01 is designed to retain the factory ONSTAR emergency services system, the warning chimes, and factory back-up camera that would both be lost when the factory radio is removed.

Note: The GMOS-LAN-01 is not compatible with amplified sound systems.

Applications: The GMOS-LAN-01 is compatible with the following GM vehicles.

Model Make 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 (for OnStar retention only) 2009
Saturn Outlook 2007-2009
Vue 2008-2009
Suzuki XL-7 2007-2008
Note: Please consult the Crutchfield Car Selector for your vehicle's compatibility.

Chime Volume Adjustment: The GMOS-LAN-01 interface features potentiometer located on the 10 pin harness of the module, to adjust the chime volume of your vehicle. Rotate clockwise to make the chime louder and counterclockwise to make the chime softer.

OEM Steering Wheel Control Compatible (optional): The GMOS-LAN-01 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).

Connections: The GMOS-LAN-01 consists of a single interface with a 16 pin connector on one end and a 18 pin connector on the other end. It also includes 3 harnesses. 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 a GM factory plug that plugs into the factory plug behind the radio. It also includes bare wire that will need to be hardwired into your new radio's harness. There is also a back-up camera harness and antenna adapter.

Optional RSE Retention Harness: The Metra GMRSAV (120GMRSAV, sold separately) is an RSE retention harness designed to retain the rear seat entertainment system in these select GM vehicles. The GMRSAV provides an audio/video input to the factory overhead video screen from your new aftermarket radio, and provides 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.

Axxess GMOS-LAN-01 Wiring Interface Reviews

Average Customer Review:

89 reviews
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Written By Bg, 30276 on Monday, March 09, 2015

Crutchfield Customer Review (What's this?)

Very easy to install

Pros: Works great, good directions

Cons: None

Works well

Written By MHall, Abbeville, SC on Wednesday, February 25, 2015

Crutchfield Customer Review (What's this?)

Works as advertised and have had no problems after installing. Connection instructions could have more information but I could figure things out and successfully make the connections.

Pros: Works very well and maintains my OnStar and chime outputs through radio

Cons: Instructions could be a little more clear. Tight fit on my installation. Had to work to get unit and extra into a place that would not interfere with dash panels.

Axxess GMOS-LAN-01 Wiring Interface

Written By Logan, Monee, illinois on Thursday, October 02, 2014

Crutchfield Customer Review (What's this?)

Easy to use and a snap to install into my 2007 Silverado pickup. Everything you need is provided which is great.

Pros: Works like a charm. Easy to install. All wiring provided.

Cons: none

Easier than I thought.

Written By Nate, Muse, pa on Thursday, September 04, 2014

Crutchfield Customer Review (What's this?)

Was much easier to to than what I thought. Alarm beeps and onstar work perfectly.

Pros: Ease of use.

Cons: None

it works

Written By stouty, Ingleside, IL on Sunday, May 18, 2014

Crutchfield Customer Review (What's this?)

Everything was there, it works well once hooked up, a little more detail in the directions would be handy, I had to make a call for some clarification from the manufacturer, phone support was good.

Pros: It was all there, and works good

Cons: Vague directions on some of the wiring (power), the price was more than it should be, no options for just a basic hookup.

Does the job

Written By Jim, Lewisburg, WV on Saturday, May 03, 2014

Crutchfield Customer Review (What's this?)

I had to get one of these to replace the radio in my GM truck. After figuring out where all the wires went and what ones I didn't need it works as intended...probably not for a novice to do. Being able to adjust the volume of the chimes is nice.

Pros: It works!

Cons: Instructions could be better.

Installation is a snap!!

Written By EricT, Tampa, FL on Monday, April 21, 2014

Crutchfield Customer Review (What's this?)

Made installation easy. Just wire it up and done!! No wires to trace.

Pros: Color coded, no chasing wires, labeled clearly.

Cons: Big unit to hide in dash.

great fit 08 equinox

Written By noah s, herrin il on Tuesday, March 25, 2014

Crutchfield Customer Review (What's this?)

great product fits great easy setup

Pros: fits good and tight like factory

Cons: when door chime or warning chime goes off the left speaker stops music and chimes and then resumes music music will play from all speakers when this happens just not out of the left while the chime is going off but thats not a big deal it allows you to hear it 2008 equinox

GM adaptor

Written By Jwest69154, Suffolk, VA on Tuesday, March 11, 2014

Crutchfield Customer Review (What's this?)

This works. I did have to read the directions for install 3 or so times. It's not that I didn't understand, it is that they were poorly written. Recommend soldering connections vice using any other connecting types.

Pros: Functionality,

Cons: Directions

2007 GMC 2500HD

Written By Chuck, Concord, CA on Monday, March 03, 2014

Crutchfield Customer Review (What's this?)

If you want to keep your chimes and OnStar you need this unit. Hook up was easy and everything works as advertised.

Pros: Easy install, works perfectly.

Cons: None

Works as advertised.

Written By Nick, Tacoma, WA on Sunday, March 02, 2014

Crutchfield Customer Review (What's this?)

It Let's you keep on star and your door chimes as advertised. However, because of of the way the speakers are wired bluetooth audio and phone calls only come through the front speakers.

Pros: Let's you keep on star and your turn signal/door open/key in ignition chimes. Wiring instructions are very straightforward.

Cons: Harness is large and if you don't shorten the wires it's a lot to hide behind a dash with little room. Bluetooth music only plays through the front speakers. There is a misprint in the instruction manual, I had to call them(use both red wires) the manual only says to use one.

Instructions are vague

Written By DH, Missouri on Wednesday, February 12, 2014

Crutchfield Customer Review (What's this?)

Not a bad product but the instructions are difficult to follow and leave a lot out that would be helpful.

Pros: Product worked as intended

Cons: Vague instructions

Axxess GMOS-LAN-01 Wiring Interface

Written By Anonymous, Atlanta, GA on Thursday, January 23, 2014

Crutchfield Customer Review (What's this?)

Very easy to install

Pros: It was free

Cons: None

Axxess GMOS-LAN-01

Written By daved1, Rochester,NY on Friday, December 20, 2013

Crutchfield Customer Review (What's this?)

Worked ok, but had some real problems understanding how to intergrade with trucks wiring. Had to call Crutchfield two times before getting it wired. Wiring diagrams really need some upgrades. diagrams should show all variations of equipment on vehicle.

Pros: Worked

Cons: Problems understanding right wiring.

Axxess GMOS-LAN-01 Wiring Interface

Written By Anonymous, Manchester nh on Monday, December 09, 2013

Crutchfield Customer Review (What's this?)

Intimidating but works great

Pros: Once you get over the rat nest of wires and control boxes easy to wire up. Just take your time , directions very clear

Cons: Too many wires, hard to stuff the massive wire ball into the dash on my silverado

Axxess GMOS-LAN-01 Wiring Interface

Written By Anonymous, Maryland on Monday, November 18, 2013

Crutchfield Customer Review (What's this?)

Perfect installation with this component

Cons: None

Access control box

Written By Tboostin, St. Paul ,MN on Friday, November 08, 2013

Crutchfield Customer Review (What's this?)

Works, looks like its worth 5 bucks, first one worked for 5 mins. Crutchfield warrantied it and second one still working. Crutchfield is great to deal with

Pros: It does the job

Cons: First on worth for 5 mins

Not Bad

Written By Dan R., Tulsa, OK on Thursday, October 24, 2013

Crutchfield Customer Review (What's this?)

Not bad, The instructions and wiring diagrams could be improved quite a bit.

Pros: did what it was supposed to.

Cons: instructions and diagrams were pretty light.

Electronic gadgets?...this piece works as claiomed

Written By Michael D, Phoenix on Saturday, August 24, 2013

Crutchfield Customer Review (What's this?)

I still need to get used to the fact that car makers need to cloak everything behind a computer. That being said in order to keep the factory sounds and alarms this is needed to make the install of the stereo work properly. I soldered and shrink fitted the wires, followed the directions to the letter and there wasn't a glitch. plugged it in and it works fine. Wish it wasn't needed but as it is, it does , be it...there were more expensive units available but this one was all I needed.

Pros: worked and was able to keep all my factory bells and whistles.

Cons: sucks that a radio installation should be complicated with all this, but it is what it is.

Easy as pie

Written By Roy B, Augusta, GA on Saturday, August 17, 2013

Crutchfield Customer Review (What's this?)

This item is so easy to install. Follow directions. That's it.

Pros: Easy installation

Cons: None

Figure out the right one

Written By manutd, Ohio on Friday, July 19, 2013

Crutchfield Customer Review (What's this?)

Better instructions would have helped. Does well when you get the right model. Easier adjustment for onstar volume would be nice.

Pros: Works

Cons: Onstar volume changed by tapping wire to ground.

Does it job well

Written By Chris L, Raleigh, NC on Friday, June 28, 2013

Crutchfield Customer Review (What's this?)

Had this installed for nine months now - no problems at all. Everything work perfectly. I took my time, made sure all connections were correct and secure. All wire joints were soldered and covered with heat-shrink. Only issue I had was with the pickup - had to cut out a piece of plastic that looked like it served no purpose (still can't figure out what it did) for more room. Hate that I had to get this but GM has their stuff inside the radios so - gotta do what ya gotta do. Instructions not really the best - as they cover several models. 2011 Silverado reg cab.

Pros: Kept everything working as it should. No maintenance and hides nicely inside dash

Cons: Instructions not the clearest

Cheap Harness

Written By Anonymous, Fort Worth, TX on Saturday, June 08, 2013

Crutchfield Customer Review (What's this?)

This harness was required in order to retain my warning chimes and Onstar. The harness was easy to install, worked great for about a week and a half. Then my radio went haywire and would not turn off with the key out of ignition and doors open. My onstar quit working. Called Crutchfield tech support and he told me to pull the battery and wait 20 minutes. This should reset my harness. Tried this, but did not work. Crutchfield is sending me a new harness. Crutchfield is great but the product is not. Im returning everything. GM really ruined it for anyone trying to put aftermarket radios in their vehicle.

Pros: Easy to install

Cons: Quit working after about a week

Nice Adapter

Written By cdunk4, Lititz, PA on Thursday, June 06, 2013

Crutchfield Customer Review (What's this?)

worked perfectly in my 2008 Chevy Equionx

Pros: easy wiring to new radio and kept all the on star and chimes working

Cons: none

Axxess GMOS-LAN-01 Factory Integration Adapter

Written By jerry b, mesquite nv on Monday, May 27, 2013

Crutchfield Customer Review (What's this?)

installed easy, worked right away

Pros: connected to steering wheel aswc-1 adapter easily, called tech support for some instruction clarification, was very helpful.

Axxess GMOS-LAN-01 Wiring Interface

Written By michael e, yorkville il 60560 on Saturday, May 25, 2013

Crutchfield Customer Review (What's this?)

this made it possible to install the radio with ease and I was able to keep all the warning tones in the truck

Axxess GMOS-LAN-01 Wiring Interface

Written By Anonymous, buffalo.ny on Sunday, May 12, 2013

Crutchfield Customer Review (What's this?)

ok but extra wires with no direction to where they go

Pros: better than hard wire

Cons: more documentation

get wired

Written By RoyC, Pittsburgh, Pa on Sunday, May 12, 2013

Crutchfield Customer Review (What's this?)

When I first got the adaptor it mas kind of intimidating. But the easy to follow directions made it easy. I soldered and shrink wrapped all of the connections and then it was a matter of plug and play. The Axxes adaptor was very worthwhile and I couldn't have done the install without it.

Pros: It was positively needed to accomplish my install. The fact that Crutchfield sold it to me for half price was an extra bonus

Cons: At first looks intimidating.

Axxess GMOS-LAN-01 Wiring Interface

Written By Anonymous, Frederick, Maryland on Tuesday, May 07, 2013

Crutchfield Customer Review (What's this?)

Nothing is wrong with this but you will probably need to call cust service for some minor Guidance. It looks intimidating but all you really need to do is just follow the instructions wire for wire and you should be fine.

Easy Install

Written By Anonymous, Lake County, IN on Sunday, May 05, 2013

Crutchfield Customer Review (What's this?)

Easy install with free tech support. only took 10 minutes to wire, and you need some wire nuts.

Pros: none

Cons: no wire nuts


Written By Johnny, Amherst , NY on Thursday, May 02, 2013

Crutchfield Customer Review (What's this?)

I used this when I put in a new JVC KW-ADV65BT DVD Receiver into my 2007 Chevy Silverado LT. Although the directions were clear for someone having installation experience, I still had to call the Crutchfield Tech Dept twice to make sure everything was installed correctly. The directions said to connect the red wire but there are two that needed to be connected together. No big deal because the guys knew it was a flaw in the directions.

Mine came with a relay so I can hear my turn signals. This was a nice surprise!

It was a great price too as it was 50% off with the head unit purchase.

Pros: Turn signal clicking and OnStar integration.

Cons: Directions could be a little better (but the tech support really helped!)

Quick installation

Written By David R, Flushing, NY on Tuesday, April 16, 2013

Crutchfield Customer Review (What's this?)

Very easy to install

Pros: Great instructions. Easy to follow

Cons: None

Metra GMOS-LAN-01 GM Factory Integration Adapter

Written By Jake, Wisconsin on Wednesday, March 27, 2013

Crutchfield Customer Review (What's this?)

Not the best product out there, but does what it is supposed to. Wiring took about an hour for me. Not very detailed instructions. Some wires may or may not be used depending on your vehicle, I know I had several I didn't use. Blinker sounds are now on with the product installed, previously weren't.

Pros: Does what it is supposed to.

Cons: Blinker sound is now on, instruction manual not detailed enough

Axxess GMOS-LAN-01 Wiring Interface

Written By dawwggy, jackson ms on Tuesday, March 26, 2013

Crutchfield Customer Review (What's this?)

Nice product it does everything it suppose to do nice adapter!!!!!!

An absolute necessity.

Written By Bill W, West Harrison, In on Tuesday, March 19, 2013

Crutchfield Customer Review (What's this?)

Made wiring to the factory harness an absolute breeze. A few minutes wiring in the house, and it made the actual install of the radio a 5 minute process. It also allows the factory warning chimes and turn signal indicator to function correctly.

Pros: Makes wiring a breeze!

Cons: It Takes a little maneuvering to get the adaptor positioned to where the radio will fit properly.

Clean install on Pioneer 2400BT

Written By LC, Williamsport, PA on Saturday, March 16, 2013

Crutchfield Customer Review (What's this?)

Follow the instructions and this is an easy install. I did have a question on the red wire on the 16 pin connector. There were 2 red wires and a quick call to support at Crutchfield clarified that I could use either one. After some deliberation I used the second one to power the backup camera in the back of the truck. That enabled me to install everything without cutting a single wire on the truck. Clean install.

Great harness!!

Written By Richard28, elgin , il 60123 on Wednesday, March 13, 2013

Crutchfield Customer Review (What's this?)

Product did exactly what I need it to do. Easy install for an amatuer. Installed it on my 2007 chevy impala . Worked great with the onstar function. Would highly recomend this product.

Pros: Easy install , great directions.

Cons: Little bulky but everything fit just right.

Axxess GMOS-LAN-01 Wiring Interface

Written By Anonymous, crofton maryland on Wednesday, March 06, 2013

Crutchfield Customer Review (What's this?)

Great product easy to install

Easy to use

Written By amsm110808, austin texas on Thursday, February 28, 2013

Crutchfield Customer Review (What's this?)

This harness was very well built and easy to use for how many wire there are.

Metra GMOS-LAN-01 GM Factory Integration Adapter

Written By Bud Blenk, Catawissa,PA on Sunday, February 17, 2013

Crutchfield Customer Review (What's this?)

UNBELIEVEABLE. big waste of money. I don't have onstar, I don't have bells and whisles. I have the standard radio and speaker package.

Pros: Wasted money

Cons: I don't have the things that require this module. Why did a 2 conection from the standard OEM radio require that mess. I'll bet I didn't use half the wires that were eliminated.


Written By Tony, Liverpool,ny on Saturday, February 09, 2013

Crutchfield Customer Review (What's this?)

Quite confusing at first and a few unused wires but after calling support they were able to help me get everything buttoned up quite nicely.not complicated at all after that.

Pros: Keeps it integrated with truck

Cons: Intimidating to the novice installer,will need to call for help

it does the job.....well sort of

Written By Glenn, palestine,tx on Friday, January 11, 2013

Crutchfield Customer Review (What's this?)

well i didnt like the fact that i had to buy this thing since gm decided it was a good idea to put special stuff into the head unit if they could only have put a good head unit in my truck instead of a piece of junk so i had to replace my stereo and had to buy this go install it it works as it should but the instructions are junk i had to call metra to ask for help and the guy didnt seem like he wanted to help even though he answered the phone as tech support, anyways aslong as you know how to install stereos most of the wires are the same color as the stereos harness, this thing also has a relay attached to it, the instructions didnt say anything about it i was going to remove it thinking it was for powering aux device but its for your turn signal clicker so dont disconnect unless you dont care about that anyways there no way around not buying one of these so i just went with the cheapest one......jokes on me, lol

Pros: it works like its suppose to

Cons: I say again the instructions are junk....i felt like i was trying to put together furniture showing pictures of one thing in the instructions and not the one you actually have

some wires not listed correct

Written By Anonymous, Chicago on Thursday, December 27, 2012

over all average

Pros: easy instructions

Cons: not all wiring are correct on instructions


Written By jamie, calhoun ga on Monday, December 10, 2012

Crutchfield Customer Review (What's this?)

easy to wire up

Pros: chimes to remind me about seat belt and low fuel

Cons: does not click when blinker is on

Works great

Written By Stan, Marion, IA on Monday, November 26, 2012

Crutchfield Customer Review (What's this?)

Works as promised. Instructions were slightly vague and it has an extra power wire that wasn't used. Also I didn't have OnStar or some of the other functions of the box but Chevy uses the radio for the door chimes and other things so it was needed in the radio swapout. A call to Crutchfield and they talked me through the not needed extra wires. All in all it made the installation easier. By the way, the chime is only in the drivers door and the radio sound shuts off while the chime is sounding off. It took a while for me to figure this out. You don't notice things like this with a stock radio but danged if you don't notice things like this when doing it yourself.

Pros: Works as advertised.

Cons: Kind of pricey, too bad the aftermarket radios don't include the circuitry in the radio.


Written By BrianL, CT on Wednesday, October 10, 2012

Crutchfield Customer Review (What's this?)

Easy to install and wire up with some patience. Works well.


Written By Willie P, Pensacola, fl on Sunday, September 16, 2012

Crutchfield Customer Review (What's this?)

This interface unit works. After installation the after market radio came up without any problems. All my vehicle warning system all work like the factory radio did.

Pros: Every thing that is needed is in the package. No wire cutting or taps.

Cons: Need more information on the wiring. Most of its installation were done by exspearance. There is a problem with what is in the box and what other items that is needed for its installation ( like the antenna conversion cable). There is one in the package of the kit. The radio face plate is all that is needed.

It's okay

Written By Cornfuzzled, Grand rapids, mi on Monday, August 27, 2012

Crutchfield Customer Review (What's this?)

Directions are a little confusing with all the harnesses and no pictures of them, but after staring awhile, it became clear and installation went ok. Way over priced for what it does in my truck, basically a seat belt chime.

Pros: It works kind of?

Cons: Way over priced for one function

What a pain ONSTAR and door chime only work through the front driver

Written By Tony R, calimesa, CA on Sunday, August 12, 2012

Crutchfield Customer Review (What's this?)

I put this in my truck and I only had sound coming out of the front driver side speaker [ the on star and door chime that is ] the radio played through all the other speakers fine so I called the tech support line and told them what was going on and he sad it was something wrong with the black box and he would send out another one I thought great just what I wanted to do take my dash all apart agin so I got the new one took everything all apart changed the box out and same thing called tech agin guy he told me it had to be in one of the wire harness so i changed them out one at a time starting with the side that plugs into the truck and then the radio side same thing onstar and door chime only coming out of the front driver side so I called agin and this guy put me on hold four like seven min and came back on and told me he just called the people who make the harness and that that is the way it works well it sure would have been nice to know this the first time I called .

Easy install

Written By Brad I., Canonsburg PA on Saturday, June 09, 2012

Crutchfield Customer Review (What's this?)

Has A bit of wires but once you get them in to groups its so easy. The one thing I didnt know is it comes with the FM antenna adapter.

Pros: Dinger volume adjustment

Cons: I dont have any

Great product

Written By Signaturepest, Riverton, UT on Tuesday, April 17, 2012

Crutchfield Customer Review (What's this?)

This product worked perfectly. It took me a little while to figure out where everything went, but I'm not too mechanically inclined. If you are, it should be easy. **Please note. The antenna adapter was included in the packaging. You do not have to order it separate. And yes it is a Chrysler antenna adapter. Don't ask me? It worked.

Pros: Once I figured out the schematics, it was easy.

Cons: Schematics were a little hard to understand at first.

Works Great!

Written By Guy, Salem, VA on Monday, April 02, 2012

Crutchfield Customer Review (What's this?)

The unit was very easy to install. The upgraded unit now includes the spdt relay already wired in as well as the antenna adaptor. I was a little concerned when I saw that it was a Chrysler antenna adaptor, but it was exactly what I needed in my 2009 Silverado. The only thing that you will need in addition to this kit is the dash adaptor kit.

Pros: Small and easy to tuck in behind the head unit.

Cons: Volume somewhat low on chimes, but not overly low.

Axxess GMOS-LAN-01 Wiring Interface

Written By Anonymous, Laredo TX on Tuesday, March 27, 2012

Crutchfield Customer Review (What's this?)

Easy install, great shopping at Crutchfield

Axxess GMOS-LAN-01 Wiring Interface

Written By Jay B, DYT OHIO on Tuesday, February 14, 2012

Crutchfield Customer Review (What's this?)


Pros: Easy to hook up

Cons: Could have more detailed instructions

Jury is out.

Written By LPasch, Dixon,IL on Monday, February 06, 2012

Crutchfield Customer Review (What's this?)

Very easy to wire up but instructions were horrible for blinker relay. Called crutchfield and tech was great at helping me walk through it over the phone but still cant get blinker noise to work. This unit is a bit too big to try and install behind the head unit and this was installed in a 2012 Silverado.Was scared to purchase after reading the other reviews but has been working fine for about a month now.

Pros: Easy wiring

Cons: TOO BIG!

Axxess GMOS-LAN-01 Wiring Interface

Written By Anonymous, Albany NY on Saturday, January 28, 2012

Crutchfield Customer Review (What's this?)

Great product easy to install

Pros: Installed in less than 5 minutes and I have no experiance

Cons: It mutes the turn signals so I forget they are on.

This is a dream come true!

Written By Luke O, Eagan, MN on Thursday, January 12, 2012

Crutchfield Customer Review (What's this?)

I used this in conjunction with the ASWC and the Kenwood KDC-X995 for my 2010 Chevrolet Silverado. Everything worked perfectly. If you have a new GM radio and want the sound improved, don't be afraid to change it, factory Bluetooth still works (sound is now better). The whole install of the GMOS-1, ASWC and my new Kenwood KDC-X995 took about 1 hour. I have installed a few stereo's in my day but the vehicles are a pain, with all of the adapters. They work much better now and I had no issues!! The only thing I lost was the turn signal sound, they gave me the relay to have the sound back but I am choosing not to have it (I hate blinker sounds, I can see if they are on or not).

Factory radio's are TERRIBLE, this gave me full functionality of all the extra I paid for. The sound was improved ten fold, plus the added subs and speakers make the sound even better.

Thank you Crutchfield for giving me QUALITY sound back in my truck.

I was nervous about losing bluetooth and steering wheel controls...don't be nervous, this with the ASWC changes the game. You can keep your Delco radio GM, my Kenwood CRUSHES!

Pros: No loss of factory anything, easy to wire, finally some rockin' sound!

Cons: The chime for doors, seatbelts, low gas is kind of lame and loud, but you can turn it down easily enough.

You will need to get this.

Written By Renthorin, Dexter MI. on Wednesday, September 14, 2011

Crutchfield Customer Review (What's this?)

I thought that because my van does NOT have Onstar I didn't need this. Wrong. You won't get the nifty radio to stock wiring harness adapter unless you get it. Furthermore, you won't have door and "headlight on" chimes as they come through the radio speakers.

I had problems with mine because where the GM adapter harness plugs into the stock van power uses very thin spade terminals. They were not making good connection and the power would come and go to the head unit. Crutchfield sent me a replacement and it did the same thing. Not a problem with the unit, just with how the connections fit. I ended up removing the two power leads from the stock and Crutchfield harness and permanently joining them together.

I never did the blinkers to sound through the speakers after the install, even though I hooked up the relay as instructed. Oh well...I can see the HUGE green arrow on the dash blinking so not worried.

Goes dead after two days

Written By zolo, USA on Monday, August 08, 2011

This unit goes dead after 2 days and one way I found out to reset it is by taking out the fuse for the unit and reseting it. I wish I would have read the reviews here before redoing the installation for the 4th time, thinking that it was something wrong I did. I called the manufaturer 3 times after doing everything they told me to do since they told me that it had to do with something in the installation, I know now they didn't want to admit it was their unit. I will have to replace this unit with a different one now. Will not recomend this unit to anyone.

It works.

Written By lmatthewj, Phoenix, AZ on Tuesday, July 26, 2011

Crutchfield Customer Review (What's this?)

It does what it's supposed to do which is the main thing. My on-star works, blinker clicks work with the relay, rear park assist works, it functions as it should. The chimes and blinker clicks have kind of a generic sound, but not a big deal. It was easy to connect as well; the radio wires matched exactly the colors of the adapter wires so that made things easy to hook up. The only thing that I ran into a small problem with was actually fitting the adapter, all of the wires, and the new radio back in the dash. I kind of had to wedge around the adapter box and smush the wires in; but eventually squeezed everything back together.


Written By EthanH, Owensboro, Ky on Thursday, July 21, 2011

Constantly needs resettings. Don't buy it.

Axxess GMOS-LAN-01 Wiring Interface

Written By Ed, Riverside, Ca on Friday, May 13, 2011

Crutchfield Customer Review (What's this?)

Works mostly has advertised.
I have had to reset it a couple of times to try to get it to work like my stock radio.
Everything is fine, but when I turn off the truck, the radio is supposed to keep
playing, and the dome light comes on.
It doesn't do that, I don't know if I am not doing the reset right, or if the unit is
When I shut the truck off the radio shuts off to, but the light doe's come on.
It's a minor thing, but it's not like it was.

When I first installed it did everything right.
I will call support for some pointers.

Too Easy

Written By Macline, Philadelphia, Pa on Monday, May 02, 2011

Crutchfield Customer Review (What's this?)

Talking about follow the color code thats all i had to do with this. Was Quick
easy instruction, and any first time could handle this hook up. All Plugs
fit nicely and all my chimes, warnings, turn signal sounds, and Onstar work
great. Great product its funny cause i was going to buy this radio somewhere
else for a cheaper price but they didn't even talk about me needing this piece
happy i got it from crutchfield.


Written By Mike C, Bluffton, IN on Saturday, April 30, 2011

Crutchfield Customer Review (What's this?)

At first everything worked great no problems , it was great. Then a few days later , I had a dead radio , nothing was working, blinker sound was gone, radio wasn't working, and the Onstar was no longer working as well. Played around with it thought I may have left a bare wire, I didn't all was hooked up correctly. Replace the battery cable then everything was fine, all was working again. Few days later I lost everything again, called Crutchfield and they told me that there is a problem with this unit that according to the manufacturer, the temporary fix is to hook up a toggle to the constant power line (yellow wire) and flip it off then on to reset the unit. I am very annoyed at the fact that I need to go out buy a swicth to turn on /off for this problem, this to me is an unacceptable fix to a problem that was known about before they sent this to the market.

Easier than expected.

Written By David, Little Rock, AR on Monday, April 18, 2011

Crutchfield Customer Review (What's this?)

Initially when I unpacked everything I was intimidated by the seemingly unending
array of wires.
However, sat and just went one by one per the instructions at the dining room
table before taking anything to the vehicle. Needed one quick call to tech
support to clarify I could tape off a couple of spare wires.
When I carried the whole thing down to the truck install was so easy it was
silly. Everything worked perfectly right off and no noticeable difference in
Onstar function.
I ended up not installing the relay for the audible turn signals click. Don't
miss it.
Despite the size of the relay box fairly easily managed to find room to tuck it
all plus wires up behind the head unit frame.
Just follow the instructions as they say and all goes fine!


Written By Merica, Fort Bragg, NC on Sunday, March 27, 2011

Crutchfield Customer Review (What's this?)

OK, I understand what it is for but seriously why not make it a little more integrated. The onstar does still work but to use it it turns off the unit. There is no plug in to use the mic you already have for bluetooth so now I have 2 and the one that comes with the unit is big and ugly.

great while it lasted

Written By matt, hazel green al on Friday, March 25, 2011

Crutchfield Customer Review (What's this?)

i installed this 3 yrs ago and have never had a problem with it until now. i stopped and got gas the other day and when i restarted my truck the stereo was dead, no power anywhere. so i removed every fuse in the truck hoping to find a bad one, no such luck. so i had to move to the dreaded task of removing my stereo. you have to understand how bad it is. i have a alpine double din dvd deck with nav, ipod control cable, back up camera, remote microphone, rca's for a seperate tv, multiple amps hooked up, steering wheel controls and a fiber optic cable. pretty much anything that can be plugged into the back of this deck is done. to find out the axxess box has power going in and not coming out. make it last longer than 3 yrs


Written By smokeyjiii, jacksonville,nc on Wednesday, March 02, 2011

Crutchfield Customer Review (What's this?)

this item works,but it will go out /freeze up on you.This is the second one that i have put in.Both items have did the same have to disconnect the battery to reset the moduale.once this is done the system will play great for about a week or so before you have to do it again. this was put in 2007 gmc with a pioneer avh-p3200bt dvd receiver.

A must have for factory like integration

Written By MikeE, Madisonville, LA on Sunday, February 13, 2011

Crutchfield Customer Review (What's this?)

Clear instructions allowing my aftermarket radio/NAV install without cutting the existing wiring harness and keeping OnStar functionality.

One complaint - I had two (2) green wires coming out of the included harness plug instead of one green and one green/brown. I "guessed" which was which and got it right (50/50 chance). Both the Reverse signal and the Park signal are used by the JVC KW-NT3HDT unit I installed.

OnStar adapter

Written By DJ, Houston,Tx on Thursday, October 21, 2010

Crutchfield Customer Review (What's this?)

It did the trick,worked great for my new Sony stereo, very well priced, half of what i would have paid if i would have bought it at a local store.

Axxess GMOS-LAN-01 Wiring Interface

Written By Mike, Detroit, Mi on Wednesday, October 06, 2010

Crutchfield Customer Review (What's this?)

Perfect!! I honestly couldnt say anything bad about the whole installation process. The
wires happen to be color coded to the wires on my aftermarket stereo. Being able to
adjust the volume on the door chime and having the choice to keep or remove the
turn signal sounds was a perfect feature for me. The ability to keep the onstar feature
and also being able to adjust the volume on the onstar system was great. Thank You
for offering such a wonderful product.

makes the best of a bad situation

Written By Pat, Wilmington De on Saturday, September 18, 2010

Crutchfield Customer Review (What's this?)

installed in a 2009 GMC Sierra.

- this product works as advertised. when used in conjunction with several other items, it helps clean up the mess GM designed.


- the unit is real big. kinda hard to find a place for it. like someone else said imagine 2 decks of plaing cards stacked on top of each other.

- if you are not using the aftermarket head unit to power the front speakers (i.e. you are using RCA jacks to a separate amp), you need to buy a supplemental speaker and find a space for it somewhere as well to hear your audible alarms.
- after purchasing both items listed above, I still needed to buy a separate switch to regain the audible turn signal sound "click".

i wish there was an "all inclusive" remedy to regain all of the things you lose when replacing the factory stereo, but this combination was all i could find, and it did work as advertised that's why i gave it 4 stars.
i really didn't even want on-star but this unit does maintain the factory on-star functions so, there's also that too i guess.

install notes
be sure to set the alarm level set screw prior to closing up your dash. (counter clockwise is LOUDER)
if you have a sierra or silverado, there is a decent place to mount the supplemental speaker behind the dash just above the plug that mechanics use to check codes. no need to drill holes to use the mounting bracket, the speaker weighs next to nothing and a couple decent cable ties should hold it securely to the chassis forever.

Cheap But works

Written By Jon, Gulfport, MS on Wednesday, August 18, 2010

Crutchfield Customer Review (What's this?)

Was faulty when installed (engine noise through speakers), very cheap design, large in size and a basic model. If I were you I would look at Pac Audio, little more pricey but they offer more features, like retaining xm radio, all warning chimes. Had to remove this and replace with a pac audio os-3.

not bad but could be better

Written By sv1000, texas on Wednesday, July 14, 2010

Crutchfield Customer Review (What's this?)

It works as it should except the sound for turn signal. i dont mind that. installed this in a 2010 Silverado as well as one of the previous reviewrs

1. The unit itself is too big and is difficult to find a place to put it but it still worked, just had to spend some time getting it all to fit.

2. The instructions were terrible. but i still got it to work.

Works, but could work better.

Written By Wise, Newport News VA on Sunday, July 11, 2010

Crutchfield Customer Review (What's this?)

I installed this in a 2010 Silverado and it works flawlessly. I have all of the same funtionality as the factory radio with the Clarion NX500 I installed. That being said.....

1. The unit itself is huge. It about the size of 2x Deck of cards sandwiched together. For the price they charge I'm sure they could have put a little effort into this and scaled it down. Had a hard time finding a place to put it where the harnesses still reached.
2. The way they have the wires coming out of it makes it impossible to have a clean install. You have wires going from both sides of the unit to both the radio harness and the vehicle harness.
3. You need a seperate relay to keep an audible noise for turn signals. The extra relay itself is large and make the install that much more difficult. I can't imagine that adding the relay in to this unit would be that dificult.
4. The instructions are lack luster at best. I was able to install without any difficulty, but I think a novice would have been confused with the instructions provided.


Written By tackett10, Kentucky on Saturday, June 12, 2010

Crutchfield Customer Review (What's this?)

Works great, easy to install, took no time!!

Axxess GMOS-LAN-01 Wiring Interface

Written By Harold, Alexandria va on Sunday, May 17, 2009

Crutchfield Customer Review (What's this?)

This thing is perfect, easy to install, thanks crutchfield

could be better

Written By Randy, Harrisonville, MO on Friday, May 08, 2009

Crutchfield Customer Review (What's this?)

Read another review where it worked great in an 06 Monte. My 06 Monte SS install manual had wiring that had changed or something because I got to know the service techs well. Was not a simple plug and play. Had to relocate a speaker for On-Star which was a pain.


Written By Bobbyb323, New Hampster on Thursday, April 09, 2009

Crutchfield Customer Review (What's this?)

Simple to install, does what it says it does. Does not retain
directional "click" sound but you can't hear it with the radio up anyways!
Adjust volume level before closing up dash.

Axxess GMOS-LAN-01 Wiring Interface

Written By alfred, TX on Monday, February 09, 2009

Crutchfield Customer Review (What's this?)

easy to install the direction help out alot.

Axxess GMOS-LAN-01 Wiring Interface

Written By chevy 08, clearwater,fl on Sunday, February 01, 2009

Crutchfield Customer Review (What's this?)

i like this product so far

Works well

Written By Toluallii, Ventura, CA on Saturday, January 24, 2009

Crutchfield Customer Review (What's this?)

I've had this unit installed for quite some time and am just getting around to reviewing it. All in all it does what it says. The directions were very straight forward and it was pretty easy to get it all working.

If you run your sound from your HU to an amp you're going to need to get another speaker to be able to hear OnStar (it says it in the manual of this unit). Not a big deal, you just have to find a place to put the speaker ;).


Written By Kaleb, iowa on Tuesday, January 13, 2009

i purchased this for my 08 sierra, wasnt to difficult to wire pretty much
matching colors. after i installed it, it kept muting mu hu, so i called metra
and they told me i needed a 10k resistor wired from the acc wire to the
mute and brown wire. not a big deal except i had to pull my dash back
apart and do this. but it solved the problem. the door chime is a little
annoying but sound is adjustable, but when ur listning to music it cuts the
music to the left front speaker for the chime. also when onstar comes on it
mutes my stereo but has a delay, it says tar ready, not a big deal but for
the price i expected more

Axxess GMOS-LAN-01 Wiring Interface

Written By ricardo, El Paso TX on Friday, August 29, 2008

Crutchfield Customer Review (What's this?)

I own a 2008 Chevy Silverado and I installed the JVC KW-NX7000 Nav/DVD system. I used the Metra GMOS for the installation since I use the On star features. Installation was very easy thanks to the instructions provided by Crutchfiled. My On star works and I can hear it through the speakers just fine (you have to fine tune it during installation). I was not aware that I needed an additional unit to hear my turn signals. Easy install and works great for plug and play.


Written By Zeke, Dallas, Texas on Tuesday, May 06, 2008

Crutchfield Customer Review (What's this?)

I have an 2008 Chevy Silverado and i just had a basic radio so i got this adapter knowing that the turn signal didnt work but it didnt really matter, it does what its suppose to, the onstar works and you can also adjust the volume of the onstar, the installation was easy and fits right into the GM harness

"Onstar, I can't hear you"

Written By Mark, PA on Sunday, May 04, 2008

My rating was based on the functionality it provided into my current system.
I knew of several people who have successfully integrated the GMOS LAN
01...that is merely replacing the factory headunit with an aftermarket HU
and nothing else.
I have previously installed a 4 channel amplifier before I added an
aftermarket headunit and that is somehow a different case.
I am not able to hear or actually know for sure that Onstar is really working
at all. When I press any Onstar button, my aftermarket HU turns off (which i
found out is normal) and thereafter should hear Onstar...but no, i didn't.
I know that to hear my blinker click I will have to install a separate SPDT
relay...i didn't want it anyway so i left it like that. Apparently, I have to
install another speaker for Onstar purposes only, which I did not expect....
nothing in the Onstar documentation or my search for information indicated
that i needed to do so. All in all, with this installed in my current set-up, I
(temporarily, until i hook a separate speaker) lost Onstar.

steering controls

Written By webster, Baltimore,Md on Sunday, February 24, 2008

Crutchfield Customer Review (What's this?)

I have a DNX7100 [DVD,NAV] installed in my 2007 Tahoe and my concern was whether or not I could still use my steering wheel controls, and a friend told me to check with Cructhfield to see if they offered anything.I called and right away I was
told about the GM factory Integration Adapter,I really enjoy this product because I
was also able to retain my Onstar capabilities and this made driving easy.

Thanks again

Crutchfield is better than......

Written By mannjp, North Georgia on Tuesday, September 25, 2007

Crutchfield Customer Review (What's this?)

I tried to buy a cd receiver locally for my 2007 Chevy Silverado, but they did not have a modulator that would allow me to keep the onstar functions or the door chimes. This unit does all that just fine.

Reasons for four stars: Does not maintain the blinker clicks (additional relay is needed if you want the blinker clicks) and changes the door chimes to a generic sound that is a bit annoying. Only four volume settings for the onstar and a bit of a convoluted process to change those settings

Huge Plus - You can adjust the sound of the door chimes.

Perfect fit

Written By Joseph, Madisonville, Ky on Sunday, February 11, 2007

Crutchfield Customer Review (What's this?)

I put this in my 06 Monte Carlo and it is a perfect fit. One local shop told me they made no harness for my car and another sold me the wrong one for $220. After all that I ordered this and put it in after it arrived the next day. Make sure you get an antenna adapter if you have on-star because a regular GM adapter will not work.

Get everything you’ll need to enjoy your new Axxess GMOS-LAN-01 Wiring Interface

Save money by doing the installation yourself. There are some tools you will need, though.
Metra Crimp Tool and Connectors

Metra Crimp Tool and Connectors

Package contains crimp tool and over 150 pieces

Item #: 120CRIMPKT


Add to Cart
Metra Crimp Tool Set

Metra Crimp Tool Set

Package contains light-duty crimp tool and 20 crimp caps

Item #: 120RCVRKIT


S&G Wire Cutter/Stripper Tool

S&G Wire Cutter/Stripper Tool

Cuts and strips 12- to 22-gauge wire

Item #: 18119100


Add to Cart
Skewdriver Pro SPK4042

Skewdriver Pro SPK4042

Ratcheting straight and offset screwdriver set with 40 bits (Skewdriver Pro with ratchet handle, pictured)

Item #: 180SPK4042


Add to Cart
Spec Tools SQR-200a Squeeze Wrench

Spec Tools SQR-200a Squeeze Wrench

Narrow space ratchet kit with 18 sockets

Item #: 180SQR200A


Add to Cart
Install Bay 3320

Install Bay 3320

Auto-ranging digital multimeter

Item #: 1203320

Add to Cart
Posi-Products™ Car Stereo Connectors

Posi-Products™ Car Stereo Connectors

16 connectors for installing a new car stereo

Item #: 669PP500


Metra Crimp Caps

Metra Crimp Caps

Package contains 100 crimp caps — for 14- to 16-gauge wire

Item #: 120CCL1614


Searches related to the Axxess GMOS-LAN-01 Wiring Interface Connect a new car stereo and retain OnStar®, the safety warning chimes, the factory backup camera (with a video receiver) in select GM vehicles