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 2 product ratings - Radio Wiring Wire Harness for Aftermarket Radio Stereo Installation 70-1858. $9. Buy It Now. 1990 Chevy CK Pickup OE Wiring Harnesses & Stereo Adapters Chevy CK Pickup 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.