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Truck Key Programming Truck key programming can be a valuable service to assist you in selling more products and services to your customers. It could also be useful as a part of no-start diagnostics. Insert the key that you have already programmed into the ignition and switch the key to the ON/RUN setting after five seconds. will blink and the key will be programmed. Transponder keys If you own a brand new vehicle, there's a 95% chance that it has a transponder chip inside