I'm located in Saginaw.
You can't unlock a bcm. Sometimes you can program options or configuration but rarely . dic and speedo aren't a problem.Hvac would be a separate module that would be flashed/programmed..
I can't remember ever seeing hvac on the list for a gp. Perhaps the wiring harness itself is physically different on cars with heated seats. I could look.
Definitely an update for the pcm on our cars but if you tune with hpt or anything else the update would be pointless.
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