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iSimple GMAHLAN (Peripheral)

Radio Replacement Interface for GM Factory Non-Amplified Systems with OnStar

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This item has been discontinued

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iSimple GMAHLAN (Peripheral)

Radio Replacement Interface for GM Factory Non-Amplified Systems with OnStar


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The Peripheral GMAHLAN is the radio replacement interface for select GM vehicles to retain OnStar. The harness is a plug and play interface that allows the installation of an aftermarket radio in 29 Bit GMLan vehicles. The GMAHLAN has an on board switch to allow audio from the OnStar system to play through the two front speakers with the OnStar is active. The interface does retain all warning chimes, Vehicle Parking Assist, and maintains audible blinker indications.

  • Radio Replacement Interface for GM Factory Non-Amplified Systems with OnStar
  • Mutes radio when OnStar is active
  • Data controlled RAP Accessory output
  • Retains vehicle warning chimes
  • Does not retain factory XM Satellite
  • Compatible with the following GM Vehicles:
  • Buick:
    • 2006 - 2007 Lucerne
    • 2008 Enclave
  • Cadillac:
    • 2007 - 2008 Escalade
    • 2007 - 2008 SRX
    • 2006 - 2008 DTS
  • Chevrolet:
    • 2007 - 2008 Equinox
    • 2006 - 2007 Monte Carlo
    • 2007 - 2008 Avalanche
    • 2007 - 2008 Silverado
    • 2006 - 2009 Impala
    • 2007 - 2008 Tahoe
    • 2007 - 2008 Suburban
    • 2008 Express
  • GMC:
    • 2007 - 2008 Yukon
    • 2007 - 2008 Acadia
    • 2007 - 2008 Sierra
  • Hummer:
    • 2008 H2
  • Pontiac:
    • 2007 - 2008 Torrent
  • Saturn:
    • 2007 - 2008 Outlook
    • 2008 Vue
    • 2007 XL-7
  • Authorized Internet Dealer
  • 1-year Manufacturer's warranty

Product History:

PAC OS-5 thumbnail
(newest, current model)
PAC OS-4 thumbnail
(previous model, replaced by PAC OS-5)
PAC OS-3 thumbnail
(previous model, replaced by PAC OS-4)
iSimple GMAHLAN thumbnail
(previous model, replaced by PAC OS-3)

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: iSimple GMAHLAN (Peripheral)