I actually had the problem described in the recall before GM issued the recall. Notes for others:
1. My dealer mechanic said that there was a TSB on this, the part he replaced was the exact part listed in this recall. I had it done under warranty, and it was at least 4 months before the recall was sannounced.
2. So, did I have the "recall fix" or not? Cruze developed a coolant leak while I was out of town and my wife took it to the dealer for that, SAME dealer mind, and after fixing the leak they ALSO did the recall fix.
I suspect this means that even if it was fixed once, if it wasn't fixed AFTER the recall announcement, it might just fail again.
It is SCARY when it goes. It always happened to me when the engine was cold and in reverse. When this vacuum switch fails to activate, I put my entire 275lbs through both of my feet on the pedal - car does not stop. I have to take the car out of gear for the brakes to actually slow and stop the car.