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Harvey I beleive that you are correct. Dealers do not have access to just pick a file and download it. They need VIN's and a connection to the truck. Some of the older devices downloaded the program to the Starscan tool but you could not save it later to a file from there.
Also Sag2 is correct, in C++ you code the files so updates look for specifics before it will write the new program. If you do not have the current calibration it will require installation of the previous programs needed as it will not skip. This is also because the new updates do not have all the old or previous updates in its program. Think of each of these as a Windows individual update but they are not service pak's that contain every update from before.
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'09 3500 QC/SWB, 4x4, Auto, ATP Catalyst Wrap, Agri-Cover, QwikLiner Bedliner and Rockers, Bilsteins, MOPAR Kicker Amp and speakers
2008 Lance 861
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