Quote Originally Posted by spfautsch View Post
Is this info from the FSM? Mine haven't arrived yet. I'm not disputing this statement but it seems like if it can ask the PCM for message 41 it could also ask it for the VIN, and derive the engine code from that. Though I doubt that's the case.
i don't know much about the ccm, but based on how GM did things in those days, i don't think that's what's going on.

Mind my asking where you uncovered this tidbit? My assumption was that the eeprom would have to be erased directly with a jtag type device. This also gives me something to look for on the remanned unit.

I'll get some high-res pics up shortly.
it does make some kind of sense that they'd design the unit to prevent tampering with the odometer after x miles had been travelled, it's possible there would be a workaround for that, though.

we do have a memory dump of the CCM but it might be faster just to see what the TECH tool is doing.