Grand Am GT 3.4L V6

• Automatic transmission
• 57,916 miles

I have been told that my vehicle probably has a bad wheel bearing because if I turn sharp to the left it pulls left and the same if I turn sharp right. I have had the car checked out for this but nothing can be found. This is dangerous because if I momentarily let go of the wheel the vehicle either heads for a ditch or oncoming traffic. I do not know what is causing my vehicle to want to kill itself and try and take me out in the process. But then again if you were manufactured by GM and they just ignore your problems it is quite understandable.