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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 prevalent. To combat this, General Motors introduced transponder keys or "chip keys". These new type of keys for cars have an electronic chip in the head of the key that sends a code to your car. If the code matches your car's engine, it will start. Transponder Keys Transponder keys are equipped with an embedded microchip that transmits an electrical signal to the car's computer onboard when the key is placed in the ignition. The