Car Stereo Wiring Harness - scosche Our stereo wiring harness kits are the best in the industry and ensure an easy and clean car stereo installation. Our extensive car stereo wiring harness collection ensures that you will find the exact harness needed for you car. GM Wiring Harnesses - Walmart GM Wiring Harnesses. Showing 40 of 3320 results that match your query. Search Product Result. Product - Wesbar 707261 4-Way Trailer Connector with 25' Wishbone Harness. Product - SCOSCHE GM01 - 1973-91 GM Car Stereo Wire Harness / Connector for Car Radio / Stereo Installation. Product Image. Price $ 10. 97. Product Title.