I want to know if I can program two trucks with the same tuner, if so is there a certain way it should be done?

 

No, the tuning can only be loaded in one truck at any given time. The tuner is locked to the VIN number of the truck the tuning is in. If you want to move the tuner from one truck to another you must return the first truck to stock and then you can move the tuner to another truck.