Driving home on the interstate at the posted 70 mph speed my electronic stability light goes off and the cars engaged suddenly begins to rapidly power down. A few moments later I was unable to maintain 40 mph as the transition revived to 2X normal levels. I was forced to pull off the interstate and turn off the car for a few minutes, restart the car and drive while the transition light remained light up. Over the past couple weeks the electronic stability light/engine powering down situation has become more frequent and almost a daily situation I expect--not a comforting feeling when on the interstate. I took the car the a local mechanic today and for once the transmition light was not on and the traction stability situation was not a problem--go figure. Anyway, the mechanic tested the car and said the issue appeared to be moisture getting into the accelerator sensor and causing the issue. He was not 100% sure and recommended I keep driving the car and bring in once the issue pops up again--sure it will. Difficult to prove without being an expert mechanic but I believe there is an engineering defect with the car creating this issue and the part should be recalled and replaced with a newly engineered moisture sealed part. All acceleration issues like this are very serious as GM should accept responsibility to fix. I replaced the same sensor approximately 2 years ago and problem persistent over that same period of time. Not what you expect when you invest in the Cadillac brand.

- Zionsville, IN, USA