All 1955 Chevrolet passenger cars and 2nd series 1955 Chevrolet trucks were the first modern Chevrolets to have a 12Volt system. The wiring in 1954 models had been changed over to the plastic covered wires rather than the old fabric wrapped.

Cadillac, Buick and Oldsmobile changed over to 12 volt systems on their overhead valve V8 models in 1953.

Ford lagged behind and didn't change their cars until 1956