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Truck Key Programming Many customers visit your store and leave keys or wallets in a mess. Many customers will pay to repair the key or fob. Most key fobs must be programmed within a certain time frame by turning the ignition "On" and then "Off". The vehicle will enter the programming mode, usually indicated by the door locks cycling or a chime that sounds. Keys One of the most valuable abilities that a mechanic can possess is the ability to create and program keys