General Motors interviews involve a situation/response type of interview. They ask about an experience with a specific scenario (see the included examples), and you explain the situation, task, action, and response. Check their website, as they provide the details you need to give for every question.

I found that most interviewers at GM have stated the interview was simple, but I found it a bit difficult for me, as someone who does not interview well.

So, I would suggest that you prepare and practice numerous times before the actual interview.

Tell me a time when you guided a team through an innovation exercise. Tell me a time when you disagreed with your boss.