---
product_id: 13208425
title: "Metra 71-1677-1 Reverse Wiring Harness for 1978-1990 GM Vehicles 12-PIN Factory Radio"
brand: "metra"
price: "€ 36.00"
currency: EUR
in_stock: true
url: https://www.desertcart.es/products/13208425-metra-71-1677-1-reverse-wiring-harness-for-1978-1990
store_origin: ES
region: Spain
---

# Power for 4 speakers 12-pin OEM radio plug Tested real-world durability Metra 71-1677-1 Reverse Wiring Harness for 1978-1990 GM Vehicles 12-PIN Factory Radio

**Brand:** metra
**Price:** € 36.00
**Availability:** ✅ In Stock

## Summary

> 🔧 Upgrade your classic GM ride with plug-and-play confidence!

## Quick Answers

- **What is this?** Metra 71-1677-1 Reverse Wiring Harness for 1978-1990 GM Vehicles 12-PIN Factory Radio by metra
- **How much does it cost?** € 36.00 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.es](https://www.desertcart.es/products/13208425-metra-71-1677-1-reverse-wiring-harness-for-1978-1990)

## Best For

- metra enthusiasts

## Why This Product

- Trusted metra brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Full Audio Power:** Delivers reliable power to all 4 speakers, ensuring rich sound quality.
- • **Rock-Solid Secure Fit:** Precision-crafted to stay firmly in place, eliminating connection issues.
- • **Seamless OEM Integration:** Effortlessly plugs into your 12-pin factory radio for a flawless connection.
- • **Installer-Friendly Design:** Engineered for quick, hassle-free installation—no expert needed.
- • **Proven Real-World Performance:** Tested under real driving conditions for dependable, long-lasting use.

## Overview

The Metra 71-1677-1 Reverse Wiring Harness is a precision-engineered 12-pin adapter designed for 1978-1990 GM vehicles. It powers 4 speakers, ensures a secure OEM fit, and is tested for reliable real-world performance, making installation straightforward and dependable.

## Description

Metra 71-1677-1 Reverse Wiring Harness for 1978-1990 GM Vehicles 12-PIN Factory Radio

## Features

- Plugs into OEM radio (12 pin)
- Power/4-speakers
- Designed with the user and installer in mind
- Tested for function in a real world environment
- Secure fit

## Product Details

- **Brand:** Metra
- **Material:** Acrylonitrile Butadiene Styrene
- **Item Weight:** 1.76 ounces
- **Connector Type:** 12 Pin Plug
- **Manufacturer:** Metra

## Images

![Metra 71-1677-1 Reverse Wiring Harness for 1978-1990 GM Vehicles 12-PIN Factory Radio - Image 1](https://m.media-amazon.com/images/I/61lkAAODeiL.jpg)

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**Shop now:** [https://www.desertcart.es/products/13208425-metra-71-1677-1-reverse-wiring-harness-for-1978-1990](https://www.desertcart.es/products/13208425-metra-71-1677-1-reverse-wiring-harness-for-1978-1990)

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*Product available on Desertcart Spain*
*Store origin: ES*
*Last updated: 2026-03-06*