If off late you have noticed that your truck does not have the power that it used to have, or that the truck is having trouble keeping up with all the newer trucks that you have come across, Cummins chips can help restore its power. A chip is a generic term that is used to describe a performance module, engine tuner, programmer or any other electronic device whose purpose is to enhance the performance of the engine. Some chips plug into the OBDII port that is located under the dash and flash the truck’s on-board computer, which is called the ECM. Other chips plug in line with the existing sensors under the hood in order to alter the factory signals as it goes through the sensors. There are also chips that completely replace the computer.