Axxess GMRC-02 Non-Amplified Non-OnStar Interface Harness for Select 2000-2005 GM Vehicles Non-Amplified, Non-OnStar Interface Harness for Select 2000-2005 GM Vehicles Provides a 12V Accessory output Retains R.A.P. (Retained Accessory Power) Not compatible with Bose or Monsoon sound systems Retains warning chimes through front left speaker