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Keyless Entry Systems For Your Truck In the 1980s, car thefts using hot-wiring became more frequent. To stop this, General Motors introduced transponder keys or "chip keys". These new types of car keys feature an electronic chip inside the head of the key that transmits the car with a specific code. If the code matches your car's engine will start. Transponder Keys A transponder key is equipped with an embedded microchip that sends an indication when the key is put into the ignition. The car's onboard comp