I'm on a quest for hacking the GM HMI 2.5 module to figure out and understand more about its functionality.
This article is a place holder for future findings and experiments.
GM HMI 2.5 EMMC Chip Pinouts for dumping the HMI 2.5 Emmc Micro Chip
For dumping the contents of the HMI 2.5 module's EMMC chip, which stores the Sat-Nav maps, calibration files and other operating files.
To be continued