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Keyless Entry Systems For Your Truck In the 1980s, car thefts using hot-wiring were becoming more common. General Motors introduced "chip keys" or transponder keys to stop this. The new car keys have an electronic chip inside the head that transmits a unique code to your vehicle. If the code is matched, your car will start. Transponder Keys A transponder key is equipped with the microchip that transmits an electronic signal when the key is put into the ignition. Th