Not really sure what it did, mechanic at my dealership is really good. He searched out update and advised me of it. Had tech line send it to him, was not even on dealership computer yet. Sometimes I feel it adjusted shift points, But could be all in my mind.
First time was a late evening appointment and the truck didn't accept it. Nissan head tech was closed. So I dropped it off for the day today. They installed my factory missing mud flaps as well.