 An important component in the ignition system of your vehicle, the GMC distributor cap is part of the process that carries high voltage spark to the engine cylinders, a necessary ingredient for the combustion process. The ignition system includes a number of components that work together to produce and transmit a supply of high voltage electricity to the engine, used to ignite the fuel and air mixture in the combustion chambers to produce engine power. The first component in this process is the coil, transmitting the high voltage to the distributor through a heavily insulated high voltage wire. The distributor must then pass the power on to the rest of the ignition system, using the GMC distributor cap and rotor. The distributor rotor is connected to the center shaft of the distributor, inside the GMC distributor cap.
 The rotor spins inside the GMC distributor cap, passing a number of contacts as it rotates, one for each cylinder of the engine. The coil sends a burst of high voltage through the distributor to the rotor to arc across to each contact in turn, as the rotor tip aligns with it. The high voltage then travels through the spark plug wires to the spark plug that is situated at each engine cylinder, enabling it to produce the spark that is needed to ignite the fuel and air in the combustion chamber. The transmission of this high voltage spark produces a gradual decline of the GMC distributor cap, making regular replacement necessary during the routine vehicle tune-up. We carry a selection of replacements for your GMC distributor cap, all at very affordable prices. Our site is secure and efficient to make ordering your GMC distributor cap replacement safe and easy, or our toll-free phone line is available for your convenience.
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