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Peripheral GMOS1

Radio Replacement Interface Harness for select 1997-2002 GM Vehicles

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This item has been discontinued

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Peripheral GMOS1

Radio Replacement Interface Harness for select 1997-2002 GM Vehicles


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Product Features:
  • Radio Replacement Interface Harness
  • For 1997-2002 GM full-size Truck & Full-size vehicles
  • Plug and play compatibility with vehicles with 21-pin (BHA1858) style harnesses
  • Interface communicates directly on the Serial Data Bus (prevents false triggering)
  • Compatible with Bose systems (when using Peripheral’s SVEN4 + SVHGM2 or SVHGM3)
  • On-board amplifier will drive two 4-ohm speakers in stereo for use with front door speakers or external speakers
  • 12-volt remote output for factory or aftermarket amplifier turn-on
  • Mute output wire to mute the aftermarket stereo head-unit
  • Includes LED indicator and adjustable L & R volume controls
  • 1-year warranty
Compatibility List:
  • Chevrolet:
    • 2001 - 2002 Avalanche
    • 1999 - 2002 Blazer
    • 1998 - 1999 Lumina
    • 1998 - 2002 Suburban/Tahoe
    • 1998 - 2002 Venture
    • 2001 Silverado
  • GMC:
    • 1997 - 2002 Sierra
    • 1998 - 2002 Suburban/Yukon
  • Pontiac:
    • 1999 - 2002 Grand Prix
    • 1998 - 2002 Montana
    Note: The GMOS1 will interface with all GM radios that use the 21 pin / 9 pin connectors. If there is a “RDS logo on the radio face or the radio uses the 24 pin / 12 pin connectors, this interface will not work

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
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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 GMOS1