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Keyless Entry Systems For Your Truck Back in the 80's car theft with hot-wiring technology became increasingly common. General Motors introduced "chip keys" or transponder keys to combat this. These new types of car keys have an electronic chip in 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 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 computer on boar