If the truck was ever used for any hauling or any work at all it would have been a good addition. The truck has a transcooler in the radiator stock so the could have bypassed it or just added a second one for that added protection. Heat and nasty fluid are an automatic transmissions worst nightmare so theres really no downside to there being another one on your truck. They could have not been able to find the correct radiator and had to add that auxiliary one in its place. Look at the bottom of your radiator if it has 2 extra ports then its the correct rad.