This sensor was actually replaced once before this also. ESC would come on and - other than the annoying warning lights - the cruise control would not function.

Car is a nightmare. Apparently this is a common problem and until someone DIES, GM will not recall it. Car started having this problem at approx 62,00o (intermittently) and around 78,000 its a constant. There is a long list of issues with this vehicle but this one is really scary. Maybe if enough of us have wrecks related to this, we can sue the sh*t out of GM. I will NEVER purchase another GM piece of sh*t.