Since you have a handheld tuner, you can check to see is Lund left the fields open (some do, some don't). Just go in and reload the same tune that is currently in the car. As part of that you can step through the low speed fan on, high speed fan on, rear gear ratio, tire counts and 1 or 2 other things. If there are no options available, then you need to ask for a copy of that same tune with the field left open.