If you have to take the truck to the dealer, it would be best to set it back to stock and get one of those covers for the OBDII port. otherwise the dealer might do a re-flash of the PCM. Then none of your tunes will work. If you know the dealer well you can just leave things as they are and tell them to NOT re-flash anything. To answer the original question though, you can take the Gryphon out and the tune will stay programmed.
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