OnStar Plug & Play Sound System Interface (Non-Bose) - Up to 2002 GM

Plugs into GM Factory Harness without Cutting or Splicing into Factory Plug
Plug & Play Feature
Interfaces Directly with Factory Equipped Bose(R) Sound System
Microcontroller Communicates Directly with OnStar's Serial Data Protocol
On-Board Amplifier will Drive Two 4 Ohm Speakers in Stereo
Use with Existing Speakers in Front Doors or Use External/Separate Speakers
12 Volt Remote Out to Turn on Factory Amplifier and Mute Wire
LED Indicator and Volume Control
Built-In Audio Isolation Circuit Eliminates Engine Noise
Auto Radio Mute