1969-72 Chevy Truck Classic Update Wire Harness Kit 1969-72 Chevy Truck Classic Update Wire Harness Kit Tweet. Product Videos. 1969-1972 Chevy C10-C20 Truck Classic Update wiring kit by American Autowire replaces old outdated original wiring with total vehicle updated wiring to support modern electronics Instrument Cluster wiring is designed with a "cluster harness disconnect" system for 1969 c10 harness | eBay Find great deals on eBay for 1969 c10 harness. Shop with confidence. Skip to main content. eBay Logo: Shop by category. Shop by category. Enter your search keyword 1969-1972 Chevy C10 Truck Wiring Harness American Autowire 510089 (Fits: 1969 C10 Pickup) Brand New. 4.5 out of 5 stars.