Hacking the GM Low Speed LAN


Goblin Guru
New use case: If we put a arduino between the BCM and the instrument cluster (IC), we could intercept the mileage coming from the BCM, subtract a given offset, and transmit the new mileage to the IC. In hacking terms, it is a man-in-the-middle attack. Then you wouldn't need to send off your ODO to be zeroed, and if you got a new BCM (like I did) then you can just apply the appropriate offset to make the mileage the same as before.