The 92 federal models don't have a DM (diagnostic module) and that may through a Ca tech which had them on everything since atleast 90.

Just as I don't see sainthood in a single moment of genius, I also don't fault one for lack of data retention; that's what books are for.

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Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician