I don't remember the specific years, but there is issues with like the '05 and earlier. My '05 patrol rig reset after a couple years. Some of my coworkers had similar incidents. Have no clue if there is a TSB.
Mine has reset at least once, today, and when my son had it must have reset a couple of times. I know the hours and miles didn't jive with each other. Today it went back to 0. I saw it when it had .9 hours on it.
Are the hours actually recorded and stored in the computer? If so could they be reset into the hour meter?
My 2008 did this when the passenger side battery failed. Low batteries and cranking it or jump starting it appear to cause a reset. Bad connections could also brown it out. Appears low voltage triggers a reset from what happened to me and what I have read. Too bad the OD isn't as sensitive - That would be a recall!
So you may have to check your grounds, battery cables and test the batteries.