I have a 99 and do have some problems with false knock, the PCM is the problem with the knock. If this next tune doesnt take care of some of the pinging Allen is switching to a 02 PCM, because we cant narrow it down to anyrthing else. Allen told me the later the year the less the problem with the false knockin, but 02 pretty much has the problem nailed. That would probably be your best year to buy but 99 is still a good choice!

Chris