GM trying to keep you from modding your vehicle

Forgot about this on the computer analogy...you are dealing with compiled software
NOT source code

Once you get past the API level, you are into source code territory

Ditto any automotive software...at the API level, compiled software and no
source code

Once you go past that and into actually changing the software...that is at the
source code level...

A case can be made that the tuner only changes at the API level and I can totally
make that case...but if something requires warranty or liability coverage...I'd
be the first to say 'you touched it, you own it'...that is business in the
software world (world wide, not just here in North America)