Metra Aftermarket Radio Harness and Antenna Adapter WM-GM3A - for GM 1988-2005
Metra Aftermarket Radio Harness and Antenna Adapter WM-GM3A - for GM 1988-2005
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Metra Aftermarket Radio Harness and Antenna Adapter WM-GM3A - for GM 1988-2005

|22 ratings
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Key item features

  • Complete Harness Kit: Includes a GM radio wiring harness and a factory antenna adapter for comprehensive aftermarket radio installation.
  • Broad Vehicle Compatibility: Designed to fit many General Motors vehicles manufactured between 1988 and 2005.
  • Seamless Radio Integration: Connects the OEM plug directly to an aftermarket radio harness, facilitating easy integration.
  • Effortless Plug-and-Play: The car radio harness adapter plugs into the 21-pin factory connector for simplified installation.
  • Essential Power Outputs: Provides power, ground, and audio outputs for four speakers, supporting basic audio functionality.
  • Standardized Color Coding: Follows the EAI color code for straightforward wire matching, aiding in correct connections.
  • Reliable Antenna Connection: Connects the GM factory antenna to the aftermarket radio adapter, ensuring radio reception.
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Customer ratings & reviews

4.1 out of 5 stars
stars
22 ratings13 reviews
How item rating is calculated
  1. 5 stars68% (15)
  2. 4 stars14% (3)
  3. 3 stars0% (0)
  4. 2 stars0% (0)
  5. 1 star18% (4)
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Showing 1-3 of 13 reviews

Oct 1, 2025
Reviewer name: Justin
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

great value

easy to install. great tech support.

Incentivized Review
Helpful?70K7KOVV8HOO829319788
Jul 7, 2025
Reviewer name: dawn
Walmart Associate
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

perfect

fit perfectly unlike the ones that I bought from the parts store for a much higher price. easy to install. easy to understand directions.

Incentivized Review
Helpful?70K7KOVV8HOO829319788
Jun 8, 2026
Reviewer name: lance
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

It was very easy/self explanatory to install. it came with everything that was needed.

Incentivized Review
Helpful?70K7KOVV8HOO829319788
Current price is $13.36
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