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Axxess AX-ADGM100 Wiring Interface

Connect a new stereo and retain OnStar®, Bluetooth®, factory amp, and safety warning chimes in 2000-up GM vehicles

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  • Axxess AX-ADGM100 Wiring Interface

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  • Axxess AX-ADGM100 Wiring Interface

 

Our take on the Axxess AX-ADGM100 Wiring Interface

by Dave Delamere

Keep your GM factory features

You want to install a new car stereo in your 2000-up GM vehicle, but you don't want to lose useful factory functions. Thanks to the Axxess AX-ADGM100 interface, you can upgrade to the higher sound quality of an aftermarket receiver while maintaining your factory-installed separate satellite radio tuner, OnStar®, Bluetooth®, factory amplifier, and the Retained Accessory Power (RAP). In some vehicles, you can also retain your factory rear seat entertainment system and your GM backup camera.

All wiring included

All harnesses are included, and this interface works with all amplified and non-amplified GM factory systems. The Axxess AX-ADGM100 interface also includes a direct connection for the Axxess ASWC-1 steering wheel control interface (sold separately), so you can keep your factory steering wheel controls when you install your new car stereo.

The package includes the Axxess AX-ADGM100 module, the GMLAN29 harness, the GMLAN11 harness, and the CLASS II harness. If your vehicle uses the GMLAN29 harness, the package also includes the16-pin backup camera harness and the 16-pin rear-seat entertainment system harness needed to retain those features (see the Details tab for compatibility chart).

Important Installation Note: If you plan on keeping the GM satellite radio tuner and your GM vehicle does not have a Driver Information Center screen, you'll need to buy a separate dash-mount screen to display satellite radio and iPod info. Your new car stereo must have a rear RCA auxiliary input. See more info on this item

Highlights:

  • works with GM vehicles with the CLASS II, GMLAN 11, or GMLAN 29-bit data systems
  • works with amplified and non-amplified systems (including systems with digital amps)
  • also allows you to retain GM satellite radio tuner in select models
  • retains rear-view camera and rear-seat entertainment system in select vehicles (new receiver must have camera input and RCA inputs)
  • provides Vehicle Speed Sensor (VSS), mute, parking brake, and reverse connections for installing a navigation receiver
  • plug and play connection for Axxess ASWC-1 steering wheel control interface (not included)
  • warranty: 1 year
  • Our 60-day money-back guarantee

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 from the Crutchfield Labs (what are the Labs?)

Product Research
What's in the box?

Download owner's manual

  • Radio replacement interface module
  • GM LAN 29 harness
  • GM LAN 11 harness
  • Class II harness
  • 4-Pin resistor pad harness
  • 16-Pin harness with stripped leads
  • 16-Pin backup camera harness
  • 16-Pin RSE harness
  • Installation instructions

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 open the box, verify contents, 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.

Adapter Features
Class II Harness
GM LAN 11 Harness
GM LAN 29 Harness
Installation Notes

Adapter Features

All-In-One GM Replacement Interface Solution: The Axxess AX-ADGM100 is an all-in-one solution to add an aftermarket radio to select 2000-up GM vehicles with the CLASS II, GM LAN 11, or GM LAN 29 bit data systems. The AX-ADGM100 can be used in vehicles with or without factory amplifiers, including digital amplified systems. The AX-ADGM100 is able to retain OnStar, Bluetooth, Satellite Radio (factory D.I.C. or optional LCD required), steering wheel controls (requires optional adapter), rear-seat entertainment (GM LAN 29 harness only; depending on type of vehicle), and factory backup camera (GM LAN 29 harness only; depending on type of vehicle). In addition, all the warning chimes and convenience features are retained that are normally lost when the OEM radio is removed. The AX-ADGM100 also provides a 12-volt/10-amp accessory output and connections to help install a navigation radio which include VSS, Parking Brake, and Reverse (rear-view camera). Common features include:

  • 12V/10A Accessory Output:  In these vehicles, there is no 12-volt accessory wire in the factory harness, which requires the installer to run an accessory wire to the fuse box or underneath the steering column when installing an aftermarket radio. The AX-ADBOX2 is designed to provide a 12-volt/10-amp switched accessory output (red wire), along with an illumination wire (orange/white wire).
  • Amp Turn-On Lead: The AX-ADBOX2 provides an amp turn-on lead (Blue/white) to turn on any factory amps. Both balance & fade control are retained.
  • Navigation Ready: The AX-ADGM100 provides a VSS (vehicle speed sense), Parking Brake, Mute, and a Reverse Gear output to make installing an aftermarket Navigation radio simpler and less time consuming.
  • OnStar/Bluetooth Compatible: The AX-ADGM100 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. This interface module will also retain your GM factory Bluetooth functionality.
  • Warning Chimes/Turn Signals: The Axxess AX-ADGM100 retains your vehicle's factory warning chimes and turn-signals.
  • 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 AX-ADGM100 is designed to retain this feature.
  • Satellite Radio: The Axxess AX-ADGM100 retains the factory Satellite Radio tuner (tuner must be separate from the factory radio). May require separate LCD screen (sold separately).
  • Optional Steering Wheel Control Interface (sold separately): The included wiring harness 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: There are three types of GM harness included (CLASS II, GM LAN 11 bit, and GM LAN 29 bit). Only one will be used for your specific vehicle. Please consult Crutchfield's Outfit My Car to see if your vehicle is compatible and what additional accessories will be needed.

Class II Harness

Class II Harness Compatibility Chart: The included Class II harness is compatible with the following 2000-up Buick, Cadillac, Chevrolet, GMC, Hummer, Isuzu, Oldsmobile, Pontiac, Saab, and Saturn vehicles (as of 7/30/2013):

Make Model Year
Buick Allure 2005-2009
Century 2004-2005
Lacrosse 2005-2011
Rainier 2004-2007
Rendezvous 2002-2007
Terraza 2005-2008
Cadillac
Escalade 2003-2006
Escalade EXT 2003-2006
Chevrolet Avalanche 2003-2006
Cavalier 2000-2005
Corvette 2005-up
Express 2003-2007
Impala 2000-2005
Malibu Classic 2004
Monte Carlo 2000-2005
Silverado 2003-2006
Silverado Classic 2007
SSR 2003-2006
Suburban 2003-2006
Tahoe 2003-2006
Trailblazer 2002-2009
Uplander 2005-2008
GMC
Envoy 2002-2009
Savanna 2003-2007
Sierra 2003-2006
Sierra Classic 2007
Yukon/XL/Denali 2003-2006
Hummer H2 2003-2007
H3 2006-2009
Isuzu Ascender 2003-2008
I Series 2006-2008
Oldsmobile Alero 2001-2004
Bravada 2002-2004
Intrigue 2002
Silhouette 2000-2004
Pontiac Aztec 2001-2005
Grand Am 2001-2005
Grand Prix 2004-2008
Sunfire 2000-2005
Saab 9-7x 2005-2009
Saturn
Relay 2005-2009

Class II Harness Feature Set:

  • 10-Amp ACC 12v output
  • Retains all factory warning chimes
  • Retains OnStar *
  • Retains factory amp *
  • Retains factory Bluetooth (hands-free phone & wireless audio streaming) *
  • Retains factory Satellite Radio (Aftermarket head unit must be equipped with a rear-panel AUX input; separate LCD screen is required to view text)
  • Provides Navigation outputs (VSS, Park Brake, Reverse signal)
  • Compatible with Axxess ASWC1 Steering Wheel Control Interface (sold separately) *
Note: *If equipped

GM LAN 11 Harness

GM LAN 11 Harness Compatibility Chart: The included GM LAN 11 harness is compatible with the following Chevrolet, Pontiac, and Saturn vehicles (as of 7/30/2013):

Make Model Year
Chevrolet Cobalt 2007-2011
HHR 2006-2011
Malibu 2008-2012
Pontiac G5 2007-2008
G6 2009-2010
Solstice 2006-2009
Saturn Aura 2006-2009
Sky 2006-2009

GM 11-Bit LAN Harness Feature Set:

  • 10-Amp ACC 12v output
  • Retains all factory warning chimes
  • Retains turn signal indicators via pre-wired relay
  • Retains OnStar *
  • Retains factory amp *
  • Retains factory Bluetooth (hands-free phone & wireless audio streaming)*
  • Retains factory Satellite Radio (aftermarket head unit must be equipped with a rear-panel AUX input; separate LCD screen is required to view text)
  • Provides Navigation outputs (VSS, Park Brake, Reverse signal)
  • Compatible with Axxess ASWC1 Steering Wheel Control Interface (sold separately) *
Note: *If equipped

GM LAN 29 Harness

GM LAN 29 Harness Compatibility Chart: The included GM LAN 29 harness is compatible with the following 2006-up Buick, Cadillac, Chevrolet, GMC, Hummer, Pontiac, Saturn, and Suzuki vehicles (as of 7/30/2013):

Make Model Year
Buick
Enclave 2007-up
Lucerne 2006-2011
Cadillac SRX 2007-2009
Escalade 2007-up
DTS 2006-2011
Chevrolet Avalanche 2007-up
Cheyenne 2013
Equinox 2007-2009
Express 2008-up
Impala 2006-up
Monte Carlo 2006-2007
Silverado (new body) 2007-up
Suburban 2007-up
Tahoe 2007-up
Traverse 2009-up
GMC Acadia 2007-up
Savanna 2008-up
Sierra (new body) 2007-up
Yukon 2007-up
Hummer H2 2008-2009
Pontiac
Torrent 2007-2009
Saturn
Outlook 2007-2009
Vue 2008-2009
Suzuki XL-7 2007-2009

GM 29-Bit LAN Harness Feature Set:

  • 10-Amp ACC 12v output
  • Retains all factory warning chimes
  • Retains turn signal indicators via pre-wired relay
  • Retains factory backup cam (aftermarket head unit with a rearview camera RCA input required)
  • Retains Rear Seat Entertainment (aftermarket head unit must feature a rear-panel AV input)
  • Retains OnStar *
  • Retains factory amp *
  • Retains factory Bluetooth (hands-free phone & wireless audio streaming) *
  • Retains factory Satellite Radio (aftermarket head unit must be equipped with a rear-panel AUX input required + factory D.I.C. + factory SWC required; otherwise separate LCD screen must be used to view text)
  • Provides Navigation outputs (VSS, Park Brake, Reverse signal)
  • Compatible with Axxess ASWC1 Steering Wheel Control Interface (sold separately) *
Note: *If equipped

Installation Notes

Satellite Radio Note: Your factory Satellite Radio information will continue to be displayed through your vehicle's factory Driver Information Center (D.I.C.). This factory D.I.C. is not removed when replacing your factory radio with your new aftermarket head unit. If your vehicle is not equipped with a separate Driver Information Center and the factory radio displays all Satellite Radio information, you will lose Satellite Radio text, unless you purchase the XIA-LCD (120XIALCD, sold separately), which provides a separate LCD screen from your new aftermarket stereo and allows you to navigate through factory installed Satellite Radio options.

Note: Vehicles that require the GM LAN 29 harness still allow you to control your factory Satellite Radio through your vehicle's factory steering wheel controls, even without the Driver Information Center; but you will lose text display.

16-Pin Harness Color Codes: In addition to the three vehicle specific harnesses, the Axxess AX-ADGM100 includes a 16-pin harness which connects between the interface module and your aftermarket receiver. These connections will need to be crimped or soldered together.

Wire Color Function
Red +12V Accessory
Blue/pink VSS (vehicle speed sense)
Brown Mute
Red +12V Accessory
Purple/black Right Rear Speaker -
Gray/black Right Front Speaker -
Green/black Left Rear Speaker -
White/black Left Front Speaker -
Orange/white Illumination Output +
Green/purple Reverse Output +
Light green Parking Brake
Blue/white Amp Turn-on
Purple Right Rear Speaker +
Gray Right Front Speaker +
Green Left Rear Speaker +
White Left Front Speaker +

Level Adjustments: The AX-ADGM100 provides chime/turn signal volume adjustment, overall gain level adjustment, and OnStar level adjustment.

  • Chime/Turn Signal Volume Adjustment: To adjust the chime volume, use a small screwdriver to rotate the module's potentiometer (located on the 8-pin harness side of the interface; closest to 8-pin harness). Turn clockwise to make the chime/turn signal louder and counterclockwise to make the chime/turn signal softer. Turn signal will not be affected in non-amplified or class II systems.
  • Overall Gain Level Adjustment: To adjust the overall audio volume of your vehicle, use a small screwdriver to rotate the potentiometer, located on the 8-pin harness side; furthest away from 8-pin harness). Turn clockwise to make gain louder and counterclockwise to make the gain softer.
  • OnStar Level Adjustment: To adjust the OnStar volume level, find the Black/Yellow wire on the 20-pin harness. Push the blue OnStar button, while the voice is speaking tap the Black/Yellow wire to ground. There are 4 volume settings for OnStar; once the 4th setting is reached and the Black/Yellow wire is tapped to ground it will automatically go back to the first volume setting. Once the volume is set, it will stay at that volume until the Black/Yellow wire is tapped to ground again. This can be set during installation and then left alone. If user adjustment is desired, a momentary contact switch (sold separately) can be added. Connect one terminal from the switch to ground and the other terminal to the Black/Yellow wire. The volume will change one level every time the switch is pressed.

RSE/Backup Camera Note: The AX-ADGM100 only retains factory RSE (rear seat entertainment) and backup camera in select vehicle's which require the GM LAN 29 harness, using the included rear-view camera harness and AV harness.

 
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Axxess AX-ADGM100 Wiring Interface Reviews

Average Customer Review:

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4 out of 5

confusing instructions

Written By MJ, boston ma on Saturday, September 13, 2014
Crutchfield Customer Review (What's this?)
 
Confusing instructions for my application. I figured it out, but wasnt quite clear. Dimmer circuit doesnt wirk as advertised following wiring instructions. Havent had time to consult tech support yet. otherwise worked well.
Pros:
Everything needed for various models of my vehicle.
Cons:
Confusing instructions due to various vehicle options.
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2 out of 5

Axxess AX-ADGM100 Wiring Interface

Written By puggsly, Dillon, MT on Sunday, March 30, 2014
Crutchfield Customer Review (What's this?)
 
easy to install but the chime part of the module dosent work
Crutchfield response on Wednesday, April 02, 2014
Our tech support team contacted the customer to offer to exchange the unit for a working one.
1 out of 1 people found this helpful
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1 out of 5

Axxess AX-ADGM100 Wiring Interface

Written By Anonymous, Bronx ny on Sunday, March 16, 2014
Crutchfield Customer Review (What's this?)
 
Totally useless......it's very bulky and nearly just fits in the truck....doesn't work on series 2 tahoes
Pros:
None
Cons:
To much work to try to make it work....huuuuu
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5 out of 5

You can make all those factory controls work!

Written By Brad S., Ann Arbor, mi on Friday, February 28, 2014
Crutchfield Customer Review (What's this?)
 
I'm not going to say it was a walk in the park to install. The instructions have to be followed closely and you will have success. The tech guys at Crutchfield are awesome and can provide the help you have to any questions that may arise during your installation.
Pros:
It just works. Makes your installation something you can be proud of.
Cons:
You have to be thorough in following the instructions. Cant short cut.
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3 out of 5

Too much stuff

Written By Rotordawg, Central, NH on Tuesday, February 04, 2014
Crutchfield Customer Review (What's this?)
 
When I selected a radio there were 2 different wiring harness that came up as options. one look like you need to splice a lot and the other looked like it had a boat load of connectors. More connectors, easier install right? NO WAY. This AX-ADGM100 came with three different harnesses, all needed splicing! I only used one of them, so you pay for stuff you don't need. You are splicing wires, so save yourself some cash and get the other one.
Pros:
Connectors fit nice and radio splicing was consistent: red/red, blue/blue, blue-pink/blue-pink, etc, etc. Crutchfield tech support is AWESOME!!!!
Cons:
Way too much in the box. Three different harnesses made me spend a half hour trying to figure out which one would work best. Big harness, hard to cram it all in dash. Instructions SUCK! I suggest reading the whole thing, even the part that you think doesn't apply. There is info there you need. No pictures to identify what stuff is.
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4 out of 5

Axxess AX-ADGM100

Written By Arnie L, Croydon Pa on Wednesday, January 22, 2014
Crutchfield Customer Review (What's this?)
 
Great product but alot of extra plugs and harness's were left over seems they could eliminate some of them and lower the price instead of trying to make one unit work for every car.
Cons:
The directions arent very clear on certain things but they do have a good phone tech support.
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1 out of 5

What a pain!!!

Written By Used to install a Jensen VM9726BT in an '06 Chevy, Albuquerque, NM on Monday, January 13, 2014
Crutchfield Customer Review (What's this?)
 
I have electronics training from the USMC, so thought I could handle this. The directions do not match the labels on the harnesses in the kit, so I had to call Crutchfield to figure out which harness to use. The price was exorbitant for what this kit does, but I needed it to retain all the functions my truck came with - and it even didn't succeed in that. The smart box that is supposed to recognize your vehicle didn't - we had to fight with it for 2 hours or more, then finally call Crutchfield to get them involved before we finally got it to work. Even so, the rear entertainment zone still doesn't work. I wound up with more unused stuff than I used - the price could come way down if they just supplied application-specific kit instead of one-size-attempts-to-fit-all. And the directions are not written for a layman - I had to call to get several terms explained so I could figure out which wires went where. And finally, there is only limited space inside the dash, and this kit was bulky with a LOT of excess wire and a real pain to get it all crammed in there.
Pros:
Crutchfield support was great and the only reason they did not get the whole order back.
Cons:
Instructions refer to part numbers which are NOWHERE except in the directions. You would think they would correct the directions to refer to the part numbers marked on the parts. The kit includes several surplus harnesses, so if you move your head unit around between numerous vehicles, you're set. Otherwise, you wind up with a lot of expensive unused scrap.
1 out of 2 people found this helpful
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1 out of 5

Only get it if you need all of its functionality

Written By EA, El Segundo, Ca on Thursday, December 19, 2013
Crutchfield Customer Review (What's this?)
 
Overkill for most applications. Get the GMOS-4 for 2000 up GM's
Pros:
None for me.
Cons:
Horrible and incorrect instructions. 3 harnesses that are not identified for their application.
1 out of 2 people found this helpful
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1 out of 5

???

Written By Darrin, South Dakota on Tuesday, December 17, 2013
 
unable to get this to work right.
Pros:
n/a
Cons:
not working like it should
Crutchfield response on Monday, December 23, 2013
We forwarded this review to our Technical Support team for follow-up. Lifetime tech support comes with every Crutchfield purchase.
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2 out of 5

Not Bad, Could be Better

Written By Ed, Gordon, Tx on Monday, December 09, 2013
Crutchfield Customer Review (What's this?)
 
For my 2003 Suburban this worked ok. The harness itself integrated well but I now own 2 other harnesses and a nav harness because it all comes in the same package. Instructions are definitely designed for a professional installer. Or maybe I am the only one who doesn't know what a 22 way or 24 way connector looks like. Could be labeled a little better. The GM harness comes with adapters for GM vehicles after 2003. So if I ever purchase a newer model vehicle I could install my stereo in it. For the money the synthesized chimes for the doors and leaving the keys in the car could be better. It said I could keep factory XM and my rear entertainment system, well the rear entertainment system works but initially had the XM channel playing through the headphones. The fix was to disconnect the XM. No big deal for us since we didn't ever use it. Connection once I figured out which bag of wires went to my vehicle was very simple. Had to adjust the chime volume on the module box down to its lowest setting. It does some weird clicks and hums to transition on the chimes but is not as noticeable as it was when we hooked it up.
Pros:
Easy connection after splicing some wires
Cons:
Poorly labeled wire harness bags, synthesized chime sounds, couldn't keep XM for my car even though I should have been able to
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2 out of 5

Has to be a better adapter

Written By MikeW, Fuquay Varina, NC on Sunday, October 20, 2013
Crutchfield Customer Review (What's this?)
 
Recommended adapter by the advisor.
Pros:
Worked on my new stereo for the most part..
Cons:
price, too many wires to splice, didn't work for the steering wheel controls or factory sat radio on my 2005 GMC Sierra. There has to be a easier way to hook up your new stereo.
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5 out of 5

Works perfectly

Written By Connor.B, Reno, NV on Thursday, October 17, 2013
Crutchfield Customer Review (What's this?)
 
It allowed me to add my Pioneer avh-4500bt head unit to my car while retaining the factory Bose system, all the normal lock and unlock chimes, the Onstar diagnostic system, and the Aux. power. Aux. Power is what allows the radio to play after you take the key out of the ignition and then turn off after you open a car door. I had professional installation on my system, so ease of installation I can't comment on.
Pros:
Worked Perfectly
Cons:
None so far.
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3 out of 5

Axxess AX-ADGM100 Wiring Interface

Written By DarrellD, San Antonio, TX on Friday, October 11, 2013
Crutchfield Customer Review (What's this?)
 
The interface on this harness was touch-n-go. The chimes worked intermittently and did not provide the rear control functionality. Crutchfield tech support was great when the issue arose and sent a replacement, however still did not provide chimes consistantly. Ended up using the GMOS-04 for the Bose system in my 04 Tahoe.
2 out of 2 people found this helpful
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For a more in-depth review and enhanced detailed information on the Axxess AX-ADGM100 Wiring Interface, please visit the Crutchfield website product page (/ISEO-rccbcspd/p_120ADGM100/Axxess-AX-ADGM100-Wiring-Interface.html ).

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