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The GMOS-045 interface by Axxess allows you to install a new car stereo, while retaining your vehicle's factory color screen. You'll also keep OnStar (and its Bluetooth features) and the factory backup camera, plus your car's aux input, warning chimes, and Retained Accessory Power (RAP) feature. This interface works in GM vehicles with or without a factory amplifier.

The interface provides accessory power for the aftermarket radio and all the connections you need for a DVD or navigation receiver. The interface also includes a prewired harness for the ASWC-1 steering wheel control adapter (sold separately), making it much easier to keep your steering wheel controls. The GMOS-045 is micro USB updatable.


  • Provides accessory power (12-volt 10-amp)
  • Retains R.A.P. (retained accessory power)
  • Retains OnStar / OE Bluetooth
  • Retains chimes
  • Adjustable volume for chimes and OnStar
  • Provides NAV outputs (mute / parking brake / reverse / speed sense)
  • Pre-wired ASWC-1 harness (ASWC-1 sold separately)
  • Retains factory color screen
  • Retains factory backup camera
  • Retains factory AUX-IN jack
  • Can be used in non-amplified or amplified models
  • Adjustable gain control for overall volume (amplified models only)
  • High level speaker input
  • Retains balance and fade
  • Micro B USB updatable