---
product_id: 333322325
title: "Metra Axxess GMOS-01 02-Up Onstar Harness Adapter with Chime, 9.30in. x 4.20in. x 2.50in."
brand: "metra"
price: "A$4"
currency: AUD
in_stock: false
url: https://www.desertcart.com.au/products/333322325-metra-axxess-gmos-01-02-up-onstar-harness-adapter-chime
store_origin: AU
region: Australia
---

# Adjustable OnStar & chime volume Compact 9.3in x 4.2in x 2.5in size 12V 10A accessory power Metra Axxess GMOS-01 02-Up Onstar Harness Adapter with Chime, 9.30in. x 4.20in. x 2.50in.

**Brand:** metra
**Price:** A$4
**Availability:** ❌ Out of Stock

## Summary

> 🚗 Elevate your GM ride with flawless OnStar & power control—because your drive deserves the best!

## Quick Answers

- **What is this?** Metra Axxess GMOS-01 02-Up Onstar Harness Adapter with Chime, 9.30in. x 4.20in. x 2.50in. by metra
- **How much does it cost?** A$4 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.com.au](https://www.desertcart.com.au/products/333322325-metra-axxess-gmos-01-02-up-onstar-harness-adapter-chime)

## Best For

- metra enthusiasts

## Why This Product

- Trusted metra brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Future-Proof USB Updates:** Easily update your interface firmware via USB to stay ahead with the latest features.
- • **Plug & Play Compatibility:** Designed for non-amplified GM vehicles with pre-wired ASWC-1 harness support (harness sold separately).
- • **Power Up Your Accessories:** Provides reliable 12-volt 10-amp accessory power to keep your devices charged and ready.
- • **Seamless OnStar Integration:** Keep your GM’s OnStar fully functional with customizable volume control for perfect in-car alerts.
- • **Chime Retention with Volume Control:** Never miss a notification—adjust chime volume to suit your driving environment.

## Overview

The Metra Axxess GMOS-01 harness adapter is a compact, plug-and-play solution designed for non-amplified GM vehicles. It retains OnStar and chime functions with adjustable volume, provides 12V 10A accessory power, supports the RAP feature, and offers USB update compatibility. Perfect for professionals seeking seamless integration and enhanced vehicle electronics performance.

## Description

Axxess Combines an Interface and DSP for Digital, Analog or Non-Amplified Vehicles! From fixed level output for digital systems to analog factory systems, or even adding a subwoofer to an OE system, the versatile AX-DSP has installers covered.

## Features

- Compatible with non-amplified GM vehicles
- Retains OnStar with adjustable volume output
- Retains chime with adjustable volume output,Provides accessory power (12-volt 10-amp)
- Retains RAP feature.Pre-wired ASWC-1 harness (ASWC-1 sold separately)
- USB update interface compatible.*If the vehicle is amplified, either use the GMOS-04 interface, or bypass the amplifier. If bypassing the amplifier, follow the Axxess Interface Amp Bypass Schematic in the doents section

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000K52DVY |
| Color | Multi Color |
| Date First Available | 6 August 2012 |
| Item Weight | 9.07 g |
| Item model number | GMOS-01 |
| Other display features | Wireless |
| Product Dimensions | 33.02 x 15.24 x 5.08 cm; 9.07 g |
| Whats in the box | Please check specs |

## Product Details

- **Brand:** Metra
- **Connector type:** USB
- **Item dimensions L x W x H:** 33 x 15.2 x 5.1 centimeters
- **Item weight:** 0.02 Pounds
- **Material:** Polyvinyl Chloride (PVC)

## Images

![Metra Axxess GMOS-01 02-Up Onstar Harness Adapter with Chime, 9.30in. x 4.20in. x 2.50in. - Image 1](https://m.media-amazon.com/images/I/511kE3EUemL.jpg)

## Questions & Answers

**Q: will this fit a 2002 trailblazer with onstar**
A: It will fit as long as your trailblazer doesn't have a Bose system. If the radio or speakers have the Bose logo on them you'll need the PAC os2c bose

**Q: will this work with a 2003 Chevrolet avalanche Z71**
A: Ya it should worked on my 02 trailblazer

**Q: Will this work for a 2001 chevy impala?? is cuz i just bought a touch screen stereo but i need an adapter for it.**
A: Worked on a 04 Chevy silverGood luck

**Q: does this harness let you still use buttons on steering wheel to control radio?**
A: Yes... It's very easy to install.. You just need to download the manual to make sure u cut the right ones for ur vehicle ...

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**Shop now:** [https://www.desertcart.com.au/products/333322325-metra-axxess-gmos-01-02-up-onstar-harness-adapter-chime](https://www.desertcart.com.au/products/333322325-metra-axxess-gmos-01-02-up-onstar-harness-adapter-chime)

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*Product available on Desertcart Australia*
*Store origin: AU*
*Last updated: 2026-03-21*