As far as the stored mileage in the PCM, I think its only there
for maintenance functions; it does *NOT* control the odo dash display. I
changed the PCM in the Durango to try and isolate a problem (truck would
quit when wet), and the mileage did not change. Just for fun we screwed
around with it at the dealership using the DRBII and the mileage changes
(and VIN changes) had no visable effects.
FYI, you can go buy a DRB ($4K Canadian) which can set both the
VIN and mileage, so having the "dealer" install it wouldn't really do
anything.
I'll look at my service manual tonight, but there must be some
additional info in dash unit itself to hold the mileage...
Craig
> >I don't know about the VIN, but the mileage must be in the computer
> because
> >the '98+ trucks use a digital odometer... the display comes directly
> from
> >the PCM (or whatever they call it)
> >This subject came up once on the DiRT list, and we were wondering if
> this
> >was a hold up to the release of the PCM... causes a real problem..
> there
> >would be a black market for low mileage PCMs... so they may REQUIRE
> that the
> >MP PCM is installed by the dealer, to ensure the old PCM is
> returned...
> >bummer.
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