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Keyless Entry Systems For Your Truck In the 80's, car theft with hot-wiring technology became more and more common. General Motors introduced "chip keys" or transponder keys to stop this. The new car keys have an electronic chip in the head which transmits a unique code to your vehicle. If the code matches your car's engine, it will start. Transponder Keys A transponder key has an embedded microchip that sends an indication when the key is inserted into the ignition. The car's onboard