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Truck Key Programming Truck key programming is an important service that will help you increase sales to customers. It is a valuable tool in conjunction with a no-start diagnosis. Insert the key that you have already programmed into the ignition, and change the key to the ON/RUN setting within five minutes. The security light will turn on and the key is programmed. Transponder keys There's a 95% likelihood that your vehicle is equipped with a transponder. These chips emit an audio frequency signal when they are inserted