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Small black rectangular interface module with wiring harness and micro USB port

Axxess Technologies

Axxess Technologies AXGM-12 OnStar Retention Interface 2004-2005 Saturn 12V

SKU CH-SW5T-1DJ1R

Retains OnStar and Bluetooth on 2004-2005 Saturn models, supplies 12-volt 10-amp accessory power and keeps R.A.P., balance and fade via Micro-B USB updatable interface

  • Product typeCar Audio Speaker Wire Adapters
  • Retains OnStar and OE Bluetooth for continued safety features
  • Provides 12-volt 10-amp accessory power for aftermarket stereo installation
  • Maintains retained accessory power feature for convenience functions
  • Adjustable OnStar volume for clear communication levels
  • Micro-B USB updatable for future firmware compatibility

Vehicle Compatibility

The Axxess AXGM-12 is an OnStar retention interface built for select 2004 and 2005 Saturn vehicles. It lets owners replace the factory radio with an aftermarket stereo while keeping the original OnStar safety and convenience features active.

Retained Functions

The module supplies a 12 volt 10 amp accessory power output and preserves the retained accessory power feature. It maintains OnStar and OE Bluetooth operation with adjustable OnStar volume, and keeps balance and fade controls functional for non-amplified factory audio systems.

Update Limitation

Firmware updates are only possible through a micro B USB connection, so a computer with that port type is required for any future revisions. The interface is designed solely for non-amplified Saturn models with OnStar and will not support factory amplified audio configurations.

How it compares

Measured against everything we stock in Factory Stereo Adapters & Interfaces, at today’s prices. Recalculated every night.

Price $86.99
Pricier than about 75% of the 112 comparable items (median $37.49).

Specifications

Product
Brand nameAxxess
Product typeCar Audio Speaker Wire Adapters

Questions about this item

Does the 12-volt 10-amp accessory power output require any fuse replacement over time?

The interface provides a 12-volt 10-amp accessory power supply; no user-serviceable fuse is mentioned in the specifications for this circuit.

What limits how long I can run OnStar voice prompts through the adjustable volume circuit?

The adjustable OnStar volume level is the practical limit; no thermal or duty-cycle restriction is documented for the retention interface.

How much heat does the Micro “B” USB updatable module generate during all-day operation?

The supplier data does not quote a thermal rating; the unit is designed for continuous vehicle use without active cooling.

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