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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. These new type of car keys have an electronic chip in the head of the key, which transmits an electronic code to your car. If the code matches, your car's engine will start. Transponder Keys Transponder keys come with an electronic chip that sends an electronic signal to the car's onboard computer when the key is placed in the ignitio