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Scosche SHGM03B

1985-Up GM Universal Speaker Harness

List price $9.95

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with warranty

Order within 47 hrs 5 mins to ship 10/24

Arrives by Monday, Oct. 31 to zip 94107

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General Features:

  • Universal Speaker Harness
  • For 1985-Up GM vehicles
  • Durable plastic and metal materials
  • Plugs directly into vehicles harness
  • EIA standard color-coded wiring
  • Authorized Internet Dealer
  • 1-year Manufacturer's Warranty

Harness Features

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.
Additional Harness Features
The various features that the wiring harness provides to your car stereo and/or audio system.
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.


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Warranty and Return Policy

Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider

Summary of Customer Ratings & Reviews

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Average Attribution Rating

Browse 2 questions and 3 answers
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Why did you choose this?
Sonic Electronix Store
Easy to use. Better than splicing and soldering.
Pike C on Dec 3, 2015
I didn't want to delete the oem speaker harnesses.
Andrew L. A on Jan 18, 2015
Will these fit a Oldsmobile Alero 1999?
drummerboy12 on Jan 26, 2015
Best Answer: Hello Devin,

Your vehicle has a few different trims/options available to it, and therefore a few different options for Speaker Harnesses. So, please contact Technical Support for details.
[Note: Most installers will often REMOVE the harness and tap into the OEM wiring, in order to avoid the confusion of the harnesses. ]

For Technical Support:
[email protected]
tel: 800.253.TECH (8324)
Reply · Report · Customer SStaff on Jan 26, 2015
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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 SHGM03B