2003-up select GM Stereo Replacement Interface
Part Number: GM28SR

GM Interface with Steering Wheel Controls

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  • Description

    This GM28SR allows you to replace your factory OEM stereo while retaining factory steering wheel controls, if the vehicle is equipped. This interface will maintain the data-controlled +12V accessory output as well as provide navigation outputs for reverse, vehicle speed pulse and park brake.*Harness sold separately

    • Retains OnStar functionality
    • Compatible with ALL levels of Bose Audio including y91 DSP systems and variants
    • Provides 12v accessory turn on wire
    • Retains steering wheel controls for Kenwood, Pionner, Apline, JVC, Clarion and Sony stereos
    • Retains all safety warning chimes
    • Data driven outputs: +12V ACC, VSS (Speed pulse), Reverse, Park Brake

    Click the harness below to view vehicle compatibility.
    2004-07 GM 11-Bit LAN
    2006-12 GM 11-Bit LAN 
    2006-up GM 29-bit LAN 
    2003-12 GM Class-2

    Why do I need to spend extra on an interface?
    An interface is a small computer system that allows your new head unit to properly communicate with your vehicle’s computer system. If you install a new aftermarket radio without using an interface, you will lose many of the standard security features of the vehicle. This is due to vehicle manufactures running part of the vehicle’s computer system through the OEM radio. Functions lost include, but not limited to, are warning chimes (keys left in ignition, lights left on, low fuel etc.), security and alarm systems, +12V accessory and more. If the +12V accessory is lost, your radio will not turn on/off automatically and will be a manual process.

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  • GM Steering Wheel Controlled Interface