Color Wiring Diagrams for Chevy Trucks – ClassicCarWiring All diagrams include the complete basic truck (interior and exterior lights, engine bay, starter, ignition and charging systems, gauges, under dash harness, rear clip, etc). 1968 through 1972 diagrams show standard indicator light and optional full gauges printed circuit board connectors. 1979, 1980, 1981 & 1982 di