Radio Replacement Interface for 2000-Up GM Class II and GMLAN Vehicles with Non-Onstar

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This item has been discontinued

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This is an Open Box Item

We have checked, tested, and confirmed this item to function properly. It contains all the same parts as a new unit, but shows some visible signs of use.
This open box product has a 30-day return policy and a 90-day warranty

Scosche Audio Store

Harness Features:

  • Radio Replacement Interface For Select GM Vehicles
  • Compatible with 2000-up GM vehicles (see compatibility chart below)
  • Compatible with GM Class II models
  • Works with select GM LAN Vehicles (see compatibility chart below)
  • Only compatible with non-onstar models
  • Compatible with select premium Bose systems (see compatibility chart below)
  • Allows you to replace your factory GM stereo and retain all safety and warning chimes to your new aftermarket car stereo
  • 90 day parts and labor manufacturer's warranty

Provides Chime to the Following:

  • Parking assist
  • Seatbelt warning
  • Lights left on
  • Retained accessory power
  • Check engine/service indicator
  • Heated seats
  • Fan speed
  • Turn signal click
  • Key left in ignition
  • +12 volt accessory power at radio
  • Low fuel
  • Low oil levels
  • Folding mirrors

Compatibility List:

  • Buick:
    • 2004-2005 Century
    • 2004-2006 Rainer
    • 2003-2005 Rendezvous
    • 2004-Up Terraza
  • Cadillac:
    • 2003-2006 Escalade (ESV and EXT)
  • Chevrolet:
    • 2003-2006 Avalanche
    • 2003 Blazer S-10
    • 2003-2005 Cavalier
    • 2004-2008 Colorado
    • 2003-2007 Express
    • 2003-2005 Impala
    • 2003 Malibu
    • 2003-2005 Monte Carlo
    • 2003-2006 Silverado Pickup 1500/3500
    • 2007 Silverado Pickup (Classic Version)
    • 2003-2006 Suburban
    • 2003-2006 Tahoe
    • 2003-2006 Trailblazer LS/LTZ
    • 2003-2005 Venture
  • GMC:
    • 2004-2008 Canyon
    • 2003-2006 Envoy SLT
    • 2003-2007 Savana
    • 2003-2004 Sonoma
    • 2003-2006 Sierra Pickup 1500/3500
    • 2007 Sierra pickup (Classic Version)
    • 2003-2006 Yukon/Yukon XL/Denali
  • Hummer:
    • 2003-2006 H2
  • Izusu:
    • 2003-2006 Ascender
  • Oldmosbile:
    • 2003 Alero
    • 2003-2004 Bravada
    • 2003-2004 Silhouette
  • Pontiac:
    • 2003-2005 Aztek
    • 2003-2005 Grand AM
Note: The Scosche GM2209SR is not designed for the Premium BOSE systems. However, Scosche lists the vehicles above as possible applications.


  • White: Left front positive
  • White/Black: Left front negative
  • Violet/Black: Right rear negative
  • Violet: Right rear positive
  • Black: Chassis ground (-12V)
  • Yellow: +12 volt battery constant
  • Red: +12 volt ACC switched
  • Blue/White: 12 volt remote output (amp remote, radio on signal)
  • Green: Left rear positive (LR+)
  • Green/Black: Left rear negative (LR-)
  • Gray/Black: Right front negative (RF-)
  • Gray: Right front positive (RF+)
  • Orange: Illumination

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
Retained Accessory Power (RAP) 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.
Buick Century
Buick Rainier
Buick Rendezvous
Buick Terraza
Cadillac Escalade
Chevy Avalanche
Chevy Blazer
Chevy Cavalier
Chevy Colorado
Chevy Express Van
Chevy Impala
Chevy Malibu
Chevy Monte Carlo
Chevy Silverado
Chevy Suburban
Chevy Tahoe
Chevy Trailblazer
Chevy Venture
GMC Canyon
GMC Envoy
GMC Savana
GMC Sierra
GMC Sonoma
GMC Yukon
Hummer H2
Isuzu Ascender
Oldsmobile Alero
Oldsmobile Bravada
Oldsmobile Silhouette
Pontiac Aztek
Pontiac Grand Am

Premium Harness Features

Factory System Amplification
This refers to the factory sound system and whether the item is compatible with amplified or non-amplified systems.
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.
Premium Bose
Standard Bose
On-Star Compatible
This means that the harness is compatible with vehicles that have On-Star built-in.
CAN-BUS Compatible
CANBUS Ballasts ensure compatibility with ALL vehicle makes and models without the need for additional accessories. In addition, they have built-in Anti-Flickering Capacitors to help prevent lighting issues caused by voltage spikes and drops by stabilizing the power.
GM-LAN Compatible
This means that the item is compatible with GM-LAN systems.
Compatible with Aftermarket Navigation Systems
This means that the item is made to work with aftermarket systems with navigation. Typically, this means that the harness has wires that are used with GPS navigation systems, such as VSS wires and others. Please read the product description for full details of this feature.
Chime Retention
This means that the harness is able to retain the vehicles chimes.

Warranty and Return Policy

Parts Warranty Duration
90 days
Labor Warranty Duration
90 days
Warranty Provider

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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: Scosche GM2209SR9 OPEN BOX COMPLETE0