GM Genuine Parts Spark Plug Wires are designed, engineered, and tested to rigorous standards, and are backed by General Motors. These single wires are encased in an insulating material, and contain connectors and insulating boots. These wires help transfer high voltage pulses between the voltage source, the distributor, and your vehicle's spark plug.GM Genuine Parts are the true OE parts installed during the production of or validated by General Motors for GM vehicles. Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE).