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Scosche GM40B Wiring Harness

Install a new car stereo in select 2004-2021 vehicles from GMC, Chevrolet, Pontiac

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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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$6.99

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Description


Scosche brand icon

Authorized dealer

Product Features:

Connections:

  • 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 (-)
Note:

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 metraonline.com for a harness that has accessory power support.

Compatible Vehicles


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

The vehicle you have selected 2013 Volkswagen CC is not compatible. Change vehicle or See list of compatible similar products


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Specifications & Details


Harness Features
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
Manufacturer

Item Details


Manufacturer:

Model Number:

GM40B

Weight:

0.10lbs

Internal SKU:

gm40b

Internal Product ID:

72941

Customer Ratings & Reviews


Scosche GM40B Wiring Harness thumbnail image

5 star
0%
4 star
100%
3 star
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2 star
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1 star
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Durability
5
Value
5
Features
5
Design
5
Usability
4

Customer Reviews

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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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Modern vehicles often require specific brackets, wiring harnesses, and mounting solutions. A fit guide ensures:

  • You see only parts engineered for your exact vehicle
  • You avoid incompatible radios, speakers, or wiring
  • Installation is smoother, faster, and frustration-free
  • You get the correct accessories the first time

Whether you're replacing a factory stereo or upgrading your entire audio system, the Fit Finder eliminates uncertainty.