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Peripheral GMCO

Radio Replacement Interface for Select GM Class II Vehicles without OnStar


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Peripheral GMCO

Radio Replacement Interface for Select GM Class II Vehicles without OnStar


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The Peripheral GMCO is a chime and data-bus integration radio replacement interface for select GM Vehicles. This chime and data-bus integration module is for select late model GM vehicles with Class-2 radios without OnStar or Premium Bose sound system. The GMCO decodes chime signal commands on the Class-2 data-bus and supplies the warning tone from the built-in speaker.

  • Radio Replacement Interface for Select GM Class II Vehicles without OnStar
  • Compatible with Standard Bose if OnStar retention is not required, or Premium Bose if the new system does not have use the OE Amplifiers
  • Produces warning chimes for door ajar, seat belt, low oil pressure, hi-temp, low fuel, headlights, etc.
  • Generates 12V Accessory output and retains RAP Function
  • uses genuine Delphi chip for seamless integration
  • Provides "healthy status" report to the Class-2 system
  • Compatible with the following GM Vehicles:
  • Buick:
    • 2005 - 2007 LaCrosse
    • 2003 - 2007 Rendezvous
    • 2007 Terraza
  • Cadillac:
    • 2003 - 2006 Escalade
  • Chevrolet:
    • 2003 - 2004 S10
    • 2003 - 2006 Venture
    • 2005 - 2008 Corvette
    • 2000 - 2005 Cavalier
    • 2003 - 2008 Trailblazer
    • 2003 - 2006 Tahoe
    • 2003 - 2006 Suburban
    • 2001 - 2003 Malibu
    • 2003 - 2005 SSR
    • 2007 Uplander
  • Authorized Internet Dealer
  • 1-year Manufacturer's warranty

Compatible Vehicles

Compatible Vehicle Make and Model
The model of vehicle that this vehicle specific product is designed for. Please keep in mind that engine variations can affect the compatibility of the products.

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Warranty and Return Policy

Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider

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Chandler, AZ

Sonic Electronix is the BEST!

April 28, 2010

I ordered a Peripheral GMCO and a couple of ground loop islolators from Sonic Electronix. I could not believe how quickly they arrived. I'm definitely using Sonic Electronix for all my future electronic needs!

The GMCO is perfect for use on a 06 Corvette that has the base radio without Onstar. The module works great and allows you to keep the chimes.

The only thing I'd change is that Peripheral (now PAC) should change the instructions for the Corvette. You should NOT cut off the RCA connectors on the Non-BOSE radio. The Base radio still has a separate amplifier, so the RCA connectors work great for this radio.

11 of 12 found this helpful

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I own a cadi XLR (class 2 radio) I do no have onstar and i am ready to remove prem bose amp. Will the gmco work ?
nicodem on Feb 7, 2015
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Sonic Electronix Wiring Guide

Wiring Diagram Legend

Warning: The image depicted shows the resistance change when wiring multiple subwoofer terminals. Please refer to your subwoofer's owner's manual for the proper wiring of its terminals. Sonic Electronix, Inc. is not responsible for damage caused to your audio system or vehicle due to improper installation. Please call tech support at 1-877-289-7664 if you require additional assistance.

Product Name: Peripheral GMCO