GM trying to keep you from modding your vehicle

Yawn... just buy your modified software from the aftermarket software vendor and install it. Replacing the original code. GM may own the code they sell you, but they can't prevent competitors from selling code.

Just as fast as the OEMs work to lock up PC's, phones, and vehicles others will devise an alternative. If there's a market, someone will fill the need.

Written on a computer sold with Windows on it and now running Unix.