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Keyless Entry Systems For Your Truck In the 1980s, car thefts 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 is found to match, the engine will start. Transponder Keys A transponder key is equipped with a microchip that transmits a signal when the key is inserted into the ignition. The car's computer verifies the code and all