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You'll have to get something to read the PCM strategy. If you know someone with an SCT tuner they can plug it up and do it without any affect on your truck.
The Scangage nor the Insight will show the strategy (flash level). If you don't know someone local with an SCT handheld, then I suggest you just drop by your dealer and ask them to check your Oasis report. If it has been updated, it will usually show up in the report. It won't show the strategy revision, but it will have the date it was done. If it isn't later than autumn of 2009, then you don't have the latest. But there is no guarantee it will be in the report. You can ask the dealer to connect to their IDS, and that will definitely tell you, but they will probably charge you for that.
Does anyone here have the flash descriptions? I made a note of the calibration ID numbers a while back. Three modules were listed. It would be interesting to know if they are the original versions for my year truck. My oasis report was suspiciously short also, that would let me know not all the work done made it on the report.