gm radio wiring harness | eBay Find great deals on eBay for gm radio wiring harness. Shop with confidence. Skip to main content. eBay Logo: 1 product rating - General Motors Car Stereo Radio Wiring Install Harness + Steering Wheel Control. $99. FAST 'N FREE. Car Stereo Radio Wiring Harness for 2004-up select Chevrolet Pontiac . Brand New. $6.