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Keyless Entry Systems For Your Truck In the 80's, car theft made use of hot-wiring technology was becoming more and more common. General Motors introduced "chip keys" or transponder keys to combat this. These new types of keys for cars have an electronic chip inside the head of the key, which transmits a code to your car. If the code matches your car's engine will start. Transponder Keys Transponder keys have an electronic chip that sends an electronic signal to the car's comput