GM Wiring Harnesses - Walmart wwwart››Automotive ElectricalGM Wiring Harnesses. Showing 40 of 3645 results that match your query. Search Product Result. Product - Hopkins 90 Degree 5th Wheel Wiring Kit, Ford/GM. Product Image. Price Product - Metra 70-2003 Radio Wiring Harness For GM General Motors 98-08 Harness + GM-10 Antenna Cable. Product Image. Price $ 14. 99. GM Stereo Wiring Harness | eBay This harness can also be used with a reverse early GM harness to add XM, Sirius Radio, or a FM Modulator without cutting or splicing into factory wiring.