Warning Light On problems of the 2009 Saturn VUE

While I am driving I have had intermittent incidents that cannot be replicated. "stabilitrak" warning light has not turned off. I have lost control of my vehicle while driving twice but was able to pull over after a few seconds. The vehicle will lose power to the dash. When I am turning the steering wheel gets very hard to turn and will turn off the radio. This will cause the car to loose power while driving. Then when I turn the car off I will be unable to get the key out or turn the vehicle on. I will have to restart the vehicle. I have replaced the battery twice and the alternator twice and this helped for 2 months then the problem persisted. I also replaced the wheel sensors to no avail. I have taken to 3 mechanics but they cannot replicate the issue. When the vehicle is in park, I will try to turn the vehicle on and then just tap on the brain compartment above the battery and sometimes this works. I have been left stranded more than I care to admit. While driving if the issues are really bad and if I have to drive long distance I will try to use cruise controll but it will not engage.