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Axxess GMOS-01

OnStar Interface for Non-Amplified GM Systems

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List price $99.99

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$84.99

with warranty

+ FREE Shipping in US 48

Order within 12 hrs 55 mins to ship 5/27

Arrives by Monday, June 1 to zip 07095

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Axxess Audio Store

Product Features:

  • Interface designed to allow for the replacement of the OEM Radio with an aftermarket unit in non-amplified GM Vehicles
  • Retain full functionality of the OnStar system with adjustable volume output
  • Retains safety and warning chimes with adjustable level output
  • Retention of the Retained Accessory Power (RAP) convenience features
  • Required outputs for the installation of a navigation radio included
  • USB updatable with Axxess USB-CAB
  • Authorized Internet Dealer
  • 1-year Manufacturer's warranty
  • Check the Product Instructions to see basic instructions and compatibility list for the Metra GMOS-01

Compatibility List:

  • Buick:
    • 2005 - 2009 Allure
    • 2004 - 2005 Century
    • 2005 - 2009 LaCrosse
    • 2004 - 2007 Rainer
    • 2002 - 2007 Rendevous
    • 2005 - 2008 Terraza
  • Cadillac:
    • 2003 - 2006 Escalade
    • 2003 - 2006 Escalade EXT
  • Chevrolet:
    • 2003 - 2006 Avalanche
    • 2001 - 2005 Cavalier
    • 2004 - 2009 Colorado
    • 2003 - 2007 Express
    • 2000 - 2005 Impala
    • 2001 - 2005 Malibu (2004-2005 Classic ONLY)
    • 2000 - 2005 Monte Carlo
    • 2003 - 2006 Silverado (all models)
    • 2007 - 2007 Silverado Classic
    • 2003 - 2006 SSR
    • 2003 - 2006 Suburban
    • 2003 - 2006 Tahoe
    • 2002 - 2009 Trailblazer
    • 2005 - 2008 Uplander
    • 2000 - 2005 Venture
  • GMC:
    • 2004 - 2010 Canyon
    • 2002 - 2009 Envoy
    • 2003 - 2007 Savana
    • 2003 - 2007 Sierra (Classic)
    • 2003 - 2006 Yukon/XL/Denali
  • Hummer:
    • 2003 - 2007 H2
    • 2006 - 2009 H3
  • Isuzu:
    • 2003 - 2008 Ascender
    • 2007 - 2008 I290
    • 2006 - 2006 I280
    • 2007 - 2008 I370
    • 2006 - 2006 I350
  • Oldsmobile:
    • 2001 - 2004 Alero
    • 2002 - 2004 Bravada
    • 2002 - 2002 Intrigue
    • 2000 - 2004 Silhouette
  • Pontiac:
    • 2001 - 2005 Aztec
    • 2001 - 2005 Grand AM
    • 2004 - 2008 Grand Prix
    • 2000 - 2005 Montana
    • 2000 - 2005 Sunfire
  • SAAB:
    • 2005 - 2009 9-7x
  • Saturn:
    • 2005 - 2007

Harness Features

Main Harness Function
Different installations on different vehicles require different harnesses. This type is what the harness is considered. Each wiring harness we sell serves a purpose such as installing an aftermarket car stereo, integrating an aftermarket amplifier with your factory car stereo, connecting Bluetooth to your factory car stereo, and more.
Connect/Install an Aftermarket Car Stereo
Additional Harness Features
The various features that the wiring harness provides to your car stereo and/or audio system.
Chime Retention
OnStar Retention
Retained Accessory Power (RAP) Retention
Compatible Vehicle Make
Allows you to view only items that are compatible with your vehicle's make. Does not guarantee that it will work with your vehicle year or model.
Buick
Chevrolet
GMC
Pontiac
Compatible Vehicle Make and Model
The model of vehicle that this vehicle specific product is designed for. Please keep in mind that engine variations can affect the compatibility of the products.
Buick Century
Buick Lacrosse
Buick Rainier
Buick Rendezvous
Buick Terraza
Chevy Avalanche
Chevy Cavalier
Chevy Colorado
Chevy Express Van
Chevy Impala
Chevy Malibu
Chevy Monte Carlo
Chevy Silverado
Chevy SSR
Chevy Suburban
Chevy Tahoe
Chevy Trailblazer
Chevy Uplander
Chevy Venture
GMC Canyon
GMC Envoy
GMC Savana
GMC Sierra
GMC Yukon
Pontiac Aztek
Pontiac Grand Am
Pontiac Grand Prix
Pontiac Montana
Pontiac Sunfire

Premium Harness Features

Factory System Amplification
This refers to the factory sound system and whether the item is compatible with amplified or non-amplified systems.
Non-Amplified
On-Star Compatible
This means that the harness is compatible with vehicles that have On-Star built-in.
Yes
Chime Retention
This means that the harness is able to retain the vehicles chimes.
Yes

Warranty and Return Policy

Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
Manufacturer

Summary of Customer Ratings & Reviews

Rating Distribution

5 Star
60%
4 Star
13%
3 Star
13%
2 Star
13%
1 Star
0%

Average Attribution Rating

Durability
4.3
Value
4.1
Features
4.1
Design
4.3
Usability
4.1
Jeff

Livonia, MI

Overall
Durability
Value
Features
Design
Usability
I bought this product

February 8, 2009

This product worked great in my 2001 impala.

14 of 21 found this helpful

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Rudy

Kentucky

Overall
Durability
Value
Features
Design
Usability
It's great unless it's defective

January 10, 2014

The unit is large and clumsy. I initially installed it and it didn't work. I checked and rechecked my wiring. The unit wasn't generating a 12v switched signal and the door chimes didn't work. I woke the next day to a dead battery. I decided to run a 12v switched feed from my ignition bypassing the unit. The next day I had another dead battery. The unit was causing a relay to fail and drawing 1.7 amps all the time.

After returning the unit for a replacement I finally got everything working properly but my 3 year old battery wouldn't hold a charge after 2 complete drains. I then had to buy a new battery.

I've had it for about a month now with no issues. The bottom line is if you get a functioning unit you're good to go. The new one works perfectly as it should. If you get a bad one just a remove it and be patient. Trying to work around a faulty unit just isn't going to work out.

12 of 19 found this helpful

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Benjamin

Germantown, MD

Overall
Durability
Value
Features
Design
Usability
Great value

September 17, 2013

I am ver pleased and highly recommend this company to anyone

10 of 18 found this helpful

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Tom

Albany,NY

Overall
Durability
Value
Features
Design
Usability
axxess -01GMOS

March 4, 2015

Wonderful product,exact replacement and my radio now works,the door chimes work correctly,,with the key in and when locking the vehicle.This product came with all necessary wiring and plugs. I would purchase this product and others from Sonic in a heartbeat. Tom,

7 of 13 found this helpful

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Randy

Melissa, TX

Overall
Durability
Value
Features
Design
Usability
ok but. . . .

March 30, 2010

i had to have this to put in my new radio, but its kinda wonky. door chimes don't always work, and loud is really loud. directions are not that easy to understand.

12 of 23 found this helpful

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Carey

Arlington, TX

Overall
Durability
Value
Features
Design
Usability
Exactly what I needed.

November 25, 2009

I had to have this product for my vehicle to make the head unit work. Purchasing it here on Sonicelectronix.com was by far the cheapest anywhere, and I got it to my front door in just a few days. AWESOME!!

9 of 17 found this helpful

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Chevy Rider

Chicago,Ill

Overall
Durability
Value
Features
Design
Usability
Satisfied shopper

September 7, 2012

Fast delivery and it works perfectly. I will continue to shop with Sonic Electronix.

9 of 18 found this helpful

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nicholas

albuquerque, NM

Overall
Durability
Value
Features
Design
Usability
perfect

March 13, 2014

Easy plug and play in my 03 trailblazer rapidly push and release the volume up button and it recognized the truck and works flawlessly

10 of 21 found this helpful

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Don

Stillwater MN

Overall
Durability
Value
Features
Design
Usability
Pretty Good

October 17, 2012

The product only worked fair for me, the steering wheel buttons don't function the same way as stock. To be fair I was sent the wrong unit to start with so I was a little frustrated having to take the radio out multiple times. I pretty much gave up after trying to program multiple times.

9 of 19 found this helpful

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Chevy Rider

Chicago,Ill

Overall
Durability
Value
Features
Design
Usability
Satisfied shopper

September 7, 2012

Fast delivery and it works perfectly. I will continue to shop with Sonic Electronix.

10 of 21 found this helpful

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H J

Palestine, TX

Overall
Durability
Value
Features
Design
Usability
AXXESS GMOS-)!

November 25, 2012

I purchased this item for the price and would recommend the product to my friends to purchase this item from Sonic because of the great prices Sonic offers.

6 of 14 found this helpful

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Blaine

Canada

Overall
Durability
Value
Features
Design
Usability
excellent product

January 23, 2015

Worked well. Good instructions. Installation easy. Would recommend to anyone. Great value.

5 of 13 found this helpful

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Jason

Bloomington, IN

Overall
Durability
Value
Features
Design
Usability
ok

February 16, 2010

Went through 3 of these before I figured out that my head unit was the problem. After that was fixed I never had an issue again. So this wiring harness does its job just fine!

5 of 13 found this helpful

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LO

Bessemer, AL

Overall
Durability
Value
Features
Design
Usability
In between

March 25, 2014

It was OK but I wouldn't recommend to anyone who has a factory Bose system in their Car. The presets of the factory amplifier stick because of the built in crossovers. If u do have a factory premium system such as Bose, I'd go ahead and spent the extra money and bypass it with a external amplifier and new component /door speakers as well. I'd just buy the regular harness instead of spending all the money u do buying this one jmo

7 of 20 found this helpful

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Steve

Saint Petersburg, FL

Overall
Durability
Value
Features
Design
Usability
Not enough details

January 11, 2015

For all intents and purposes the product works very well. However, the instructions were very vague and might as well not even been included with the package. description of the item also did not mention that it did not control steering wheel functions but did promise to retain all factory functions.

4 of 16 found this helpful

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Browse 7 questions and 17 answers
Hide answersShow all answers | Sort by
Why did you choose this?
Sonic Electronix Store
easy installation and no loss of functionality. have no intentions of using on star, no sense making it unusable either.
Eric B on Mar 23, 2015
Really made the installation easy. Highly recommended.
Charles M on Dec 17, 2014
needed for install
amy c on Feb 4, 2015
its nice
tristan on Nov 28, 2014
Will this keep my steering wheel controls working, or do I need to add the ASWC one also?
A shopper on Dec 8, 2014
Best Answer: Hello,

The GMOS-01 by itself will NOT retain SWC. It has the SWC harness included but NOT the actual MODULE. Therefore, the ASWC-1 is needed; Which does provide you with the module. The GMOS has the harness, in order to ease installation.
Reply · Report · Sonic Electronix SStaff on Dec 8, 2014
· Add Answer · I Have This Question Too (2)
Just this in my 02 trailblazer. I have steering wheel Con tools for the radio. My head unit has 3 wires each labeled steering wheel control 1,2,3. What wires do I attach them on this device or, do I need a swi?
Stephen M on Jan 31, 2015
Best Answer: Hello Stephen,

The Axxess GMOS-01 will NOT retain Steering Wheel Controls, so no connections are to be made to it to retain said controls. The Axxess ASWC-1 is required to retain the controls.
Axxess ASWC-1
Axxess ASWC-1
Reply · Report · Customer SStaff on Feb 2, 2015
· Add Answer · I Have This Question Too (1)
i do not have bose but i do have a factory amp. is this the right one?
A shopper on Aug 28, 2014
Best Answer: Yes. There's an option to wire it with factory amp.
Reply · Report · Gary S on Aug 29, 2014
· Add Answer · I Have This Question Too (1)
my 2001 Impala has Onstar and an amp but we will not be using Onstar, what do we do?
rusty l on Jan 20, 2015
Best Answer: Hello,

By referring to "an amp" I assume you mean the Amplified GM System [Bose, or Premium Audio, Etc..] . If so, we are obligated to strongly suggest the Axxess GMOS-04 . However, you are free to Request the Scosche GM09SR if you wish. Please place your order Over The Phone to do so.
Scosche GM09SR
Scosche GM09SR
Reply · Report · Customer SStaff on Jan 20, 2015
· Add Answer · I Have This Question Too (0)
Do I have to have this to make an after market radio work in my 2006 chevy trailblazer?
A shopper on Nov 9, 2014
Best Answer: You can still install an aftermarket radio .. But if u don't use the aftermarket wiring harness your door chimes abd warning lights / sounds will no longer work ..
Reply · Report · Tc60979 Tracy C on Nov 10, 2014
· Add Answer · I Have This Question Too (0)
Which Harness would I need for a 2000 Chevy Impala, with a factory amp?
A shopper on Mar 11, 2015
Best Answer: Hello,

Your vehicle requires the Axxess GMOS-04 .
Reply · Report · Customer SStaff on Mar 11, 2015
· Add Answer · I Have This Question Too (0)

Product Summary

Manufacturer

Model Number

GMOS-01

UPC

086429106172

Weight

0.95lbs

Internal SKU

gmos01

Internal Product ID

12900

Sonic Electronix Wiring Guide

Wiring Diagram Legend

Warning: The image depicted shows the resistance change when wiring multiple subwoofer terminals. Please refer to your subwoofer's owner's manual for the proper wiring of its terminals. Sonic Electronix, Inc. is not responsible for damage caused to your audio system or vehicle due to improper installation. Please call tech support at 1-877-289-7664 if you require additional assistance.

Product Name: Axxess GMOS-01