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Metra 70-1677-1 Wiring Harness thumbnail image
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Factory OEM Harness Found!

This was a unique factory stereo harness that had me going CRAZY trying to locate the correct harness. I have been in Automotive management for 23 years and have watched electronic technology worm its way into everything related to the Automotive Industry. The days of "poking and proding" wires to find current have been long gone because this ancient practice invites corrosion and resistance a place to begin life. Metra's wonderful product allowed me to make a quick and simple connection and finish this job without disrupting my factory connectors. "Plug n Play." I will never look at anything but Metra's product line again! Thank You!

By Jeffery on April 3, 2014

57 found this helpful


Great Service very quick shipping

This made installation of my Eonon M1U easy as pie to install,didn't have to worry about getting wires mixed up. Not many companies have parts for my 1984 Buick Lesabre SONIC came thru for me would recommend them to all my friends. Stop searching the web for your electronic parts if SONIC doesn't have it you probably don't want it anyway!

By UncleTony 1959 on March 30, 2014

56 found this helpful


Great buy.

This harness made installation a breeze. Very affordable and easy to use.

By Em on November 4, 2020 Checkmark Icon Verified purchase

34 found this helpful


great product

Absolute necessity for my installation, much more technical without it.

By David on November 24, 2015

34 found this helpful


Awesome kit

I used the kit on a gbody car i installed it with no issues fit like a glove if your in a gbody an need a harness for you ride this is it. Car it was installed on is a 1986 Chevrolet Monte carlo ss

By Bryan on September 11, 2022

33 found this helpful


Perfect!

This wiring harness is perfect fit. Installation time only took a small bit. For my application, this wiring harness is a hit!

Ordering from Sonic is a breeze. These people are not sleaze. Sonic knows their stuff! They are not gruff.

If you want your car stereo to be a perfect fit, order from Sonic. Then your car stereo will be symphonic. Because if it does not fit, you must acquit

Sonic is the best, the hell with the rest!!

By CWLeonard on May 26, 2016

32 found this helpful


Awesome kit

I used the kit on a gbody car i installed it with no issues fit like a glove if your in a gbody an need a harness for you ride this is it. Car it was installed on is a 1986 Chevrolet Monte carlo ss

By Bryan on September 11, 2022 Checkmark Icon Verified purchase

30 found this helpful


Loved the product

I loved this product. It put me at a level of relief knowing that if I wanted to return to factory I could with no hassle. I love how easy this product made it to put an aftermarket radio in my car.

By Timothy on November 13, 2016 Checkmark Icon Verified purchase

31 found this helpful


Perfect fit

I installed this on my new receiver and it was a perfect fit to my OEM C10/R10 truck. Must have when installing, makes it clean and less wiring issues...!

By Fan2zee on November 30, 2015 Checkmark Icon Verified purchase

28 found this helpful


Nice value

Depending on your make and model one of the two pieces will fit.

By Joseph on June 27, 2022 Checkmark Icon Verified purchase

25 found this helpful


Great product

This product was a perfect fit for my Chevy.
The installation was relatively easy with a nice tight fit for the single din pioneer HU. Thanks Sonic Electronix's customer service.

By RayC on January 12, 2016

12 found this helpful


By Blake on August 23, 2024 Checkmark Icon Verified purchase

1 found this helpful


By William on August 2, 2025 Checkmark Icon Verified purchase


By dan on May 4, 2025 Checkmark Icon Verified purchase


By Brandon on March 19, 2025 Checkmark Icon Verified purchase


By Harrison on December 29, 2024 Checkmark Icon Verified purchase


By craig on September 4, 2024 Checkmark Icon Verified purchase


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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.