The Chevrolet Cavalier Dual-fuel is a passenger car that was manufactured by General Motors from 1995 to 2005. It was equipped with the GM 2.2 L Ecotec four-cylinder engine and a dedicated second fuel system that allowed it to operate on either gasoline or natural gas. The natural gas system was shipped ready to be installed and included fuel lines, valves, and a propane tank. The vehicle was able to run on both fuel sources with the press of a button, allowing the owner to switch between gasoline and natural gas with the flip of a switch. The Dual-Fuel Cavalier was discontinued in 2005 due to lack of demand.