Just because emissions are in tact doesn't mean it wasn't or isn't tuned.
Dealer run ECM check is the only certain way.
And dealers sell deleted trucks all the time. Being "safe" buying from a dealer is a myth.
Other clues possibly tuned. Gauges, egt probe, not a guarantee but a clue.
Aside from the payload rhetoric that is getting tossed into this thread.....thanks weight cops for your service, lol, just becasue a truck was or is tuned does not make it a bad deal or an abused truck. But you have to have the confidence in how it was treated.
Won't get that from a dealer, but possible to judge a private seller.
