Compatible with 1968-1969 Chevrolet/GMC C/K Series Truck, Blazer & Suburban

This harness plugs into the dash harness at the firewall on your truck. Common circuits include the ignition coil, wipers, heater blower, starter, temperature, oil pressure and others, depending on the year and option of your truck. This wiring harness is for a V8 engine with automatic transmission and HEI ignition upgrade (and has the proper connections to the distributor and coil).