My husband works for GM and last year on our honeymoon we got the backstage tour of test track. All you have to do is go through a side entrace, I forgot what exactly the door says, but you have to show your badge and they let you in. They have sort of a VIP lounge set up and you can see the loading area for test track as well as the ride moving along the course. It's really neat. They even serve you soft drinks and doughnuts (they did for us). Then when your ready they take you the back way onto the ride and you completly bypass the line as well as the fast pass line. It's pretty neat. Just don't forget some type of proof that you work for GM.