Looking at buying a 2012 truck that is tuned. The dealer doesn't have the tuner. Do I need the stock tune if I want to use a different tuner?
So if I tune it now then want to return it back to stock it will put the the original race tune back on not a generic stock file?
So if I tune it now then want to return it back to stock it will put the the original race tune back on not a generic stock file?
Yes. The device will consider the current tuning as the "stock" file.
What will happen if it is the stock tune? It's up to the dealer.
The ez lync will save whatever tune is on the truck and reinstall it when you return to stock later.