OnStar® interface
Maintains operation of OnStar for aftermarket stereos
Incorporates a microcontroller that communicates directly with OnStar's serial data protocal to prevent false triggering thus eliminating unwanted audio noise through speakers

Onboard 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 to attenuate the after market stereo

LED indicator and volume control
Built in audio isolation circuit eliminates engine noise
Will not false trigger

Note: The OS-1 will not work with OnStar® equipped vehicles that have factory radios with RDS (Class 2 headunits). Factory radio's with RDS can be indendified by locating an RDS logo on the front face of the factory radio. OS-1 currently supports trucks and SUV's from 1996-2001 and 1999-2002 Pontiac Gran Prix. Pontiac Grand Prix with Bose® requires a OEM-1 and a AMP-GM21B wire harness

Compatibility List
1996-2002 Trucks and SUVs (without Bose)
1999-2003 Grand Prix

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  • Model: OS-1
  • Manufactured by: PAC

This product was added to our catalog on Wednesday 07 July, 2010.