1990 chevy wiring harness | eBay Find great deals on eBay for 1990 chevy wiring harness. Shop with confidence. Skip to main content. eBay Logo: 1990 2x4 Chevy Truck Wiring Harness Engine Computer Support Bracket. Pre-Owned. $12. or Best Offer New Listing 70-1858 Radio Wiring Harness For GM 88-05 Harness / 40-GM10 Factory Antenna (Fits: 1990 Chevrolet) Brand New. 1990 Chevy Corvette OE Wiring Harnesses & Stereo Adapters Chevy Corvette 1990, Factory Replacement Wiring Harness by Metra®, with OEM Radio Plug. For factory stereo. This high-quality Metra wiring harness is just what you need to replace your defective or aged factory wiring harness.