didnt have time search for the threads bout this tsb so i just made my own. just had my trunk in the dealer trying to get the leaf spring tsb performed on it. well they gave me no bull shit and performed all the work, had all the parts in the warehouse and only had to leave my truck there for a day.
my brother and have the same trucks. but he has not yet had this update performed. put his truck next to mine and checked the ride height. from center cap of rim to the fender mine had 23" his only had 22". and update did not compromise the ride at all.
one free inch for free. i know its not much but ill take it.