Metra 70-2104 Wiring Harness

Install a new car stereo in select 2006-2011 Chevrolet HHR

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• Direct Connection to the factory harness
• Color coded wires for easy installation
• No cutting or splicing required

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Product Features:

  • Wire harness to Install a new car stereo in Compatible with select 2006-2011 Chevrolet HHR
  • Plugs into the cars original factory radio connectors
  • Color-coded wires for easy installation to the aftermarket radio
  • No wire cutting needed for factory radio connectors
  • 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 (-)

Compatible Vehicles

Please use our Fitment Guide to determine specific compatibility for the submodel and audio features

  • 2006 Chevrolet HHR
  • 2007 Chevrolet HHR
  • 2008 Chevrolet HHR
  • 2009 Chevrolet HHR
  • 2010 Chevrolet HHR
  • 2011 Chevrolet HHR

Specifications & Details

Harness Features
Vehicle Sound System
Standard Sound
Main Harness Function
Connect/Install an Aftermarket Car Stereo
Warranty and Return Policy
Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider

Item Details


Model Number:




Internal SKU:


Internal Product ID:


Customer Ratings & Reviews

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Customer Reviews

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It will work, but it will disable the chime

I didn't buy this adapter, it came with the car when I bought it used. It had an aftermarket radio installed, but the car did not have any warning chimes. At first, I thought the worst and thought that the car had the radio wires clipped off at the connector. It turned out that they used this harness.

This harness is listed on this site for the Chevrolet HHR, but it's a generic GM harness that works for GM cars built from 2005 up. The exception are the GM cars with the vehicle information display in the radio (Malibu, G6, Equinox), and the W body cars (Impala/Impala Limited/Monte Carlo, Grand Prix, and Lacrosse)

The major drawback from this harness is that you will lose the retained accessory power feature for the radio, as well as the chimes the car normally has for unfastened seat belts, low fuel, key in ignition when door is open, etc. Onstar won't work with this harness, but my understanding is that Onstar gets disabled anyways when the factory radio is removed.

The description says you don't have to cut the factory wiring, but you do have to tap or strip the wire jacket to a wire that switches on when the key is in the accessory position. Alternatively, if you don't want to mess with the wires behind the dash or don't know which wire will power when the key is in the "ACC" position, you can simply jump the red accessory wire to the yellow power wire, which will keep the radio powered at all times, so you would have to be mindful of making sure the radio is switched off when you exit the car.

Overall it gets 4 stars since this disables chime, R.A.P., and Onstar, but also because it is not 100% plug and play considering that you must essentially know how to get the radio to work on the acc position.

By E on April 16, 2018


found this helpful.

De aquellas!!

Compré este adaptador para mi 2007 chevy cobalt coupe,?aunque estaba posteado para ser usado en hhr quedó como guante además de exelente funcionamidnto y facil instalacion, con este vendedor encontre un super precio y envio gratis,

By Jorge on April 28, 2016


found this helpful.

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  • Owner’s manual
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  • Vehicle produced after 2005: Inside driver’s side door
  • Vehicle produced before 2005: Rear passenger doorjamb, glove box, center console, or engine compartment
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