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Keyless Entry Systems For Your Truck In the 1980s, car thefts utilizing hot-wiring became more common. To stop this, General Motors introduced transponder keys or "chip keys". The new car keys include an electronic chip in the head that transmits a unique code to your vehicle. If the code is matched, your car will begin. Transponder Keys Transponder keys have an electronic chip that sends an electrical signal to the car's computer onboard when the key is inserted into the ignition. The onboard computer of