Toy will get the flash either way. First the update has nothing at all to do with tune it is a different control module all together. 2nd they get paid to service the vehicle and as it is a preapproved service recall all they have to do is get the vin and say they did it. So they want to do it. If and it will not but if it affects your tune they will say it is on you as it is and we all k ow that. This again is why I say have a device and your tune saved. Then you can simply thank the man pay nothing and int he parking lot....read,save, write. Then drive off. Maybe at low boost you could idle out of service bay but you are not driving home un tuned. This is why I say the new "keys" to the truck are in the software so save file on thump drive and reccomend owning a device. Sent from my SM-N960U using Tapatalk