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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 prevalent. General Motors introduced "chip keys" or transponder keys to stop this. These new types of car keys feature an electronic chip within the head of the key that transmits a code to your car. If matches your car's engine will start. Transponder Keys A transponder key features the microchip that transmits a signal when the key is inserted into the ignition. The computer in the car verifies the code, and allows the engine star