This new old stock horn relay was manufactured by General Motors for use on the following models: Chevrolet Truck 1966 Series 50 with D351, Chevrolet Truck 1966 Series 60 ( D, DH478) with heavy duty wiring (2nd design), Chevrolet Truck 1970-1972 Tilts, Chevrolet Truck 1972 Series 40 thru 60 except Tilts, Chevrolet Truck 1973 Series CG, CM, SG, SM, TG, TM, Chevrolet Truck 1973-1975 Series SS, Chevrolet Truck 1973-1977 Series CE, CS, ME, SE, TE, Chevrolet Truck 1975 Series CY, Stamped: 12V NOTE: Images show the condition and what is included in the sale. This item may be repackaged to protect it from shelf wear.