67-72 wiring diagram - Chevy Truck SPID Labels 67-72 wiring diagram . Back to FAQ Home 67-72 Chevy Wiring Diagram - Wiring Forums This is the 67-72 Chevy Wiring Diagram of a graphic I get directly from the 1971 Chevelle Starter Wiring Diagram collection. Light Switch Wiring Diagram 1979 Gmc.