It has to connect to the vehicles ECM. Loaded with Cummins software, it wouldn't have any GM controllers loaded. Looks like you have to wait to get the GM software
We used the thick blue shop paper towels. Lay it across socket the shove the bolt head in socket. Tear off excess. Keeps the bolt in while starting it.
We used a socket, wobble, long extension, and an impact. Zipped em right out. Took longer turning the crank to line em up with opening than getting em out