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Black plastic 21-pin GM radio harness with short pigtail wires

METRA

METRA 70-1858 GM 1988-2005 21-pin harness 5 in car electronics accessory

SKU CH-9Q8C-XA2FX MPN 70-1858

Connects an aftermarket stereo to GM vehicles from 1988 to 2005 using a 21-pin factory plug and a 5-inch lead

  • Key featuresFeature OEM-Quality Terminals For The Most Secure
  • Product typeCar Stereo Add-Ons
  • Plugs directly into the factory 21-pin radio connector
  • OEM-quality terminals give a secure factory-style connection
  • Five-inch length provides flexible routing behind the dash
  • Fits GM vehicles from 1988 through 2005

GM 1988-2005 Harness Fit

This Metra 70-1858 harness connects an aftermarket stereo to the factory wiring in General Motors vehicles built between 1988 and 2005. It uses the original 21-pin connector so no cutting or splicing of the vehicle loom is required. The five-inch length provides enough reach for most dash openings without excess cable.

21-Pin Interface Limit

The plug matches only the 21-pin radio connector used during those model years, so it will not fit earlier or later GM harnesses that use a different pin count. The short five-inch lead is intended for direct behind-the-radio installation and cannot span longer distances without an extension. Buyers needing a different pin layout or extra length must choose another adapter.

How it compares

Measured against everything we stock in Car Audio Accessories & Wiring, at today’s prices. Recalculated every night.

Price $2.99
Cheaper than about 98% of the 2,768 comparable items (median $21.99).

Specifications

Product
Brand nameMetra
Product typeCar Stereo Add-Ons
Size & build
Shipping weight0.45 kg
Package size127 × 102 × 51 mm

Questions about this item

Does the 21-pin plug match every GM radio from 1988 to 2005?

The harness uses the 21-pin connector found on GM factory radios across the 1988-2005 range, so it fits those applications directly.

Is the 5-inch lead long enough to reach an aftermarket head unit in a double-DIN dash?

At 5 inches the pigtail is designed for close-coupling behind the factory radio cavity; extensions are often needed for deeper double-DIN installs.

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