The first time I have seen any code from the trillion dollar automobile sector make it into the Open Source world, not that I go looking. What else could there be?
"The GENIVI Alliance is a non-profit automotive industry alliance committed to driving the broad adoption of open source, In-Vehicle Infotainment (IVI) software and providing open technology for the connected car. The GENIVI Alliance was founded on March 2, 2009 by BMW Group, Delphi, GM, Intel, Magneti-Marelli, PSA Peugeot Citroen, Visteon, and Wind River Systems"
Let's try General Motors:
https://github.com/GeneralMotors
Yep, that is empty.