PAC OS-2CBOSE Open Box Complete

GM OnStar, Bose Interface

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This item has been discontinued

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Product Features:

  • Item Condition: Open Box Complete
    • Maintains operation of OnStar and factory Bose amplifiers for GM Class 2 Factory Stereos
    • Onboard switching allows the OnStar system to play through front factory speakers and mutes the replacement stereo
    • Provides an accessory turn-on wire
    • Warning chimes retained
    • Includes the PAC CM1 Chime Module
    • Compatible 2003 Models: Escalade, Tahoe, Suburban, Yukon, Denali, H2
    • Compatible 2001-2003 Models: Envoy, Trailblazer
    • 1-year warranty

    For use with vehicles with Bose Amplifiers ONLY

    Compatibility List:

    • Chevrolet:
      • 2001-2004 Trail Blazer *
      • 2003-2006 Avalanche
      • 2003-2006 Silverado
      • 2003-2006 Suburban
      • 2003-2006 Tahoe
    • GMC:
      • 2001-2004 Envoy SLT *
      • 2003-2006 Denali *
      • 2003-2006 Yukon SLT
      • 2003-2006 Yukon Denali *
      • 2003-2006 Sierra
      • 2003-2006 Sierra Denali *
    • Cadillac:
      • 2003-2006 Escalade *
    • Oldsmobile:
      • 2001-2004 Bravada *
    • Hummer:
      • 2003 H2 *
      • 2004-2007 H2

    NOTE: Vehicle with a * next to them designate vehicles with a premium Bose system. Other vehicles without the * denote a standard Bose systems. The premium systems have 5+ EQ settings, while the standard systems only have 3 EQ settings.


    • Yellow – 12V Constant
    • Red – 12V Accessory
    • Black - Ground
    • Orange – Dash Light Dimmer/Illumination
    • Green – Left Rear Speaker (+)
    • Green with Black Stripe Left Rear Speaker (-)
    • White – Left Front Speaker (+)
    • White with Black Stripe – Left Front Speaker (-)
    • Purple – Right Rear Speaker (+)
    • Purple with Black Stripe – Right Rear Speaker (-)
    • Gray – Right Front Speaker (+)
    • Gray with Black Stripe – Right Front Speaker (-)
    Wires have been cut

    Harness Features

    Vehicle Sound System
    This refers to what kind of sound system the vehicle has. Premium audio systems are generally name brand systems (such as JBL, Bose, Rockford Fosgate, etc) that have been installed inside a vehicle when it leaves the factory. Often they more advanced systems, complex wiring, factory amplifiers, and other features that can make installing aftermarket component difficult.
    Premium Sound
    Main Harness Function
    Different installations on different vehicles require different harnesses. This type is what the harness is considered. Each wiring harness we sell serves a purpose such as installing an aftermarket car stereo, integrating an aftermarket amplifier with your factory car stereo, connecting Bluetooth to your factory car stereo, and more.
    Connect/Install an Aftermarket Car Stereo
    Additional Harness Features
    The various features that the wiring harness provides to your car stereo and/or audio system.
    Chime Retention
    OnStar Retention
    Compatible Vehicle Make
    Allows you to view only items that are compatible with your vehicle's make. Does not guarantee that it will work with your vehicle year or model.
    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.
    Cadillac Escalade
    Chevy Avalanche
    Chevy Silverado
    Chevy Suburban
    Chevy Tahoe
    Chevy Trailblazer
    GMC Envoy
    GMC Sierra
    GMC Yukon
    Hummer H2
    Oldsmobile Bravada

    Premium Harness Features

    Compatible Premium Audio Systems
    Some vehicles have higher end audio systems installed in them by the manufacturer. This specifies which premium audio systems this item is compatible with.
    Standard Bose
    On-Star Compatible
    This means that the harness is compatible with vehicles that have On-Star built-in.
    Chime Retention
    This means that the harness is able to retain the vehicles chimes.

    Warranty and Return Policy

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

    Summary of Customer Ratings & Reviews

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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: PAC OS-2CBOSE Open Box Complete