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Keyless Entry Systems For Your Truck In the 1980s, car burglaries using hot-wiring became more common. General Motors introduced "chip keys" or transponder keys to stop this. The new car keys include an electronic chip in the head that transmits a unique number to your vehicle. If the code matches your car's engine, it will begin. Transponder Keys Transponder keys are equipped with a microchip which transmits an electrical signal to the car's onboard computer once the key is placed in