Originally Posted by Lgndryhr
To access the code do we need an OBD 2 device or what? What language is the code in?
You need an OBD II device, plus an interface tool that can write to the CANbus (the GMLAN doesn't have any security protocols, so you don't need a password to get write permissions).
The code is written in C++ but all of the data is done in HEX.