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Keyless Entry Systems For Your Truck Back in the 80's car theft using hot-wiring technology was becoming more and more common. General Motors introduced "chip keys" or transponder keys in order to stop this. The new car keys include an electronic chip in the head that transmits a unique code to your vehicle. If the code matches, your engine will begin. Transponder Keys A transponder key features the microchip that transmits a signal when the key is put into the ignition. The onboard computer of the car verifies the code, and permits the engin