Metra 70-2103

Wire Harness to Connect an Aftermarket Stereo Receiver for 2004-2006 Chevrolet Malibu/Pontiac G6 Vehicles

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Product Features:

  • Plugs into car harness
  • Harness does not supply an ignition source and all of the factory warning chimes will no longer function
  • OnStar features will also be lost
  • For 2004-2006 Chevrolet Malibu, 2005-2006 Chevrolet Cobalt and 2005-2009 Pontiac G6
  • Allows for the installation of an aftermarket radio using the existing factory wiring and connectors
  • No cutting of factory wiring needed
  • 1-year Manufacturer's warranty


  • 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 (-)

This harness does not provide accessory power. The included Red wire will need to be run to the fuse box to supply accessory power to the aftermarket radio. A brass fuse tap is provided to assist you in tapping into the fuse box. If you prefer a wiring harness that will provide this function for you please visit for a harness that has accessory power support.

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.
Standard 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
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.
Chevy Malibu
Pontiac G6

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.
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
1 year
Labor Warranty Duration
1 year
Warranty Provider

Summary of Customer Ratings & Reviews

Rating Distribution

5 Star
4 Star
3 Star
2 Star
1 Star

Average Attribution Rating


Wilmington, DE

Don't go to B*** B**. Works on '06 Cobalt.

February 18, 2013

I went to B*** B** to get a wire harness for my 2006 Cobalt. "Geek S****" told me the ONLY harness that would work was a $90 piece that "maintained security beeps" - nothing else that would work with my car exists. I turned him down, found this online, and saved $81 installing my new radio. It's been 6 months and it still works perfectly and I don't notice any difference in security beeps or whatever. Just do a little research before going to B*** B** - and make them your last option.

12 of 15 found this helpful

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Browse 3 questions and 6 answers
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Why did you choose this?
Sonic Electronix Store
Cheaper harness for gm models with door chimes. Who needs em?
Galen W on Apr 16, 2015
A cheaper alternative if you don't want to splurge for the adapter that controls warning chimes, onstar, etc.
Kurtis C on Jul 30, 2014
Do I have to use this on my 05 malibu or will the Metra 70-2103 work? My car does not have onstar or steering wheel controls, nothing fancy like that.
Austin f on Feb 1, 2015
Metra 70-2103
Metra 70-2103
Scosche GM13SR
Scosche GM13SR
Best Answer: The interface will do two things for you: it will retain your warning chimes and it will provide the proper input for the "Ignition" wire on the aftermarket radio. You can use the 70-2103 but you will have to find your own "ignition" source and you will have no one else to blame if you leave your headlights on and kill your battery.
Reply · Report · nc-stereoman on Feb 28, 2015
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what is the red for? where does it go?
A shopper on Aug 6, 2015
Best Answer: If you have the Monsoon radio system, it uses GM RAP system. Meaning it doesn't have a dedicated power cable. The red cable is power for your radio. You will need to run it to a ign source such as ign fuse on the passenger kick panel
Reply · Report · Brian B on Aug 6, 2015
· Add Answer · I Have This Question Too (0)

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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: Metra 70-2103