1988 s10 wiring harness | eBay Find great deals on eBay for 1988 s10 wiring harness. Shop with confidence. Skip to main content. eBay Logo: Chevy S-10 Truck 1982-1988 Factory Stereo to Aftermarket Radio Harness Adapter. Brand New. $6. FAST 'N FREE. Buy It Now. Guaranteed by 1988 Chevy S-10 Blazer OE Wiring Harnesses & Stereo Chevy S-10 Blazer 1988, 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.