I have an 06 Impala and have replaced the power steering pump twice and I am still having the same problem. After the first pump was installed it worked for a few days and then started squealing again and so my mechanic flushed the line....The same thing happened...it lasted a few days and then continued squealing. So then he said that the pump was bad so I had bought another one and returned that one. Now this new one is installed and I am having the same problems!! It will be easy to turn at first with little squealing but after a few days of driving, the squealing gets worse and then it becomes hard to turn the wheel. Does ANYONE has any suggestions of what it could be? Or even how to fix this problem???? PLEASE HELP!!