I have been in contact with numerous people at GM customer service and none of them could help. I have had numerous log numbers, but I will give you 2 of them. 71-898957030 and 71-934239701. i have spoken with John, Angelina and her supervisor Nancy. Bottom line is that they told me that this is within GM specs and they will not do anything for me. Nothing I say will get any response from GM. I am now in the process of trading it in for a new FORD. This problem has been getting worse and I am not waiting for it to get to a point that I have to carry a case of oil around.